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Finding the Fourth Proportional to 643,326.30, 887,773.14 and 371,385

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Solution

The fourth proportional to 643,326.30, 887,773.14 and 371,385 is: 512,501.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,326.30 : 887,773.14 = 371,385 : x
  2. Step 2: Convert to fraction form
    643,326.30/887,773.14 = 371,385/x
  3. Step 3: Cross multiply
    643,326.30x = 887,773.14 × 371,385
  4. Step 4: Simplify right side
    643,326.30x = 329,705,627,598.90
  5. Step 5: Solve for x
    x = 329,705,627,598.90/643,326.30
  6. Step 6: Final answer
    x = 512,501.40

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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.