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Finding the Fourth Proportional to 641,713.64, 885,565.09 and 351,344.03

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Solution

The fourth proportional to 641,713.64, 885,565.09 and 351,344.03 is: 484,854.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,713.64 : 885,565.09 = 351,344.03 : x
  2. Step 2: Convert to fraction form
    641,713.64/885,565.09 = 351,344.03/x
  3. Step 3: Cross multiply
    641,713.64x = 885,565.09 × 351,344.03
  4. Step 4: Simplify right side
    641,713.64x = 311,138,007,547.91
  5. Step 5: Solve for x
    x = 311,138,007,547.91/641,713.64
  6. Step 6: Final answer
    x = 484,854.91

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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.