Home / 643,927.80-965,114.10-328,222.20

Finding the Fourth Proportional to 643,927.80, 965,114.10 and 328,222.20

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Solution

The fourth proportional to 643,927.80, 965,114.10 and 328,222.20 is: 491,936.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,927.80 : 965,114.10 = 328,222.20 : x
  2. Step 2: Convert to fraction form
    643,927.80/965,114.10 = 328,222.20/x
  3. Step 3: Cross multiply
    643,927.80x = 965,114.10 × 328,222.20
  4. Step 4: Simplify right side
    643,927.80x = 316,771,873,153.02
  5. Step 5: Solve for x
    x = 316,771,873,153.02/643,927.80
  6. Step 6: Final answer
    x = 491,936.94

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Double scale
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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.