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Finding the Fourth Proportional to 643,669.65, 965,504.48 and 360,234.45

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Solution

The fourth proportional to 643,669.65, 965,504.48 and 360,234.45 is: 540,351.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,669.65 : 965,504.48 = 360,234.45 : x
  2. Step 2: Convert to fraction form
    643,669.65/965,504.48 = 360,234.45/x
  3. Step 3: Cross multiply
    643,669.65x = 965,504.48 × 360,234.45
  4. Step 4: Simplify right side
    643,669.65x = 347,807,973,524.16
  5. Step 5: Solve for x
    x = 347,807,973,524.16/643,669.65
  6. Step 6: Final answer
    x = 540,351.68

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Double scale
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Similar ratio
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1.5x scale

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.