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Finding the Fourth Proportional to 643,326.68, 887,773.68 and 371,385.38

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Solution

The fourth proportional to 643,326.68, 887,773.68 and 371,385.38 is: 512,501.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,326.68 : 887,773.68 = 371,385.38 : x
  2. Step 2: Convert to fraction form
    643,326.68/887,773.68 = 371,385.38/x
  3. Step 3: Cross multiply
    643,326.68x = 887,773.68 × 371,385.38
  4. Step 4: Simplify right side
    643,326.68x = 329,706,165,500.80
  5. Step 5: Solve for x
    x = 329,706,165,500.80/643,326.68
  6. Step 6: Final answer
    x = 512,501.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.