Home / 643,566,524.35-965,349,786.53-212,745,020.35

Finding the Fourth Proportional to 643,566,524.35, 965,349,786.53 and 212,745,020.35

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Solution

The fourth proportional to 643,566,524.35, 965,349,786.53 and 212,745,020.35 is: 319,117,530.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,566,524.35 : 965,349,786.53 = 212,745,020.35 : x
  2. Step 2: Convert to fraction form
    643,566,524.35/965,349,786.53 = 212,745,020.35/x
  3. Step 3: Cross multiply
    643,566,524.35x = 965,349,786.53 × 212,745,020.35
  4. Step 4: Simplify right side
    643,566,524.35x = 205,373,359,979,129,280
  5. Step 5: Solve for x
    x = 205,373,359,979,129,280/643,566,524.35
  6. Step 6: Final answer
    x = 319,117,530.53

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Double scale
Find fourth proportional to 643,566,525.35, 965,349,788.03 and 212,745,021.35
Similar ratio
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.