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Finding the Fourth Proportional to 625,310.40, 862,877.28 and 353,402.88

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Solution

The fourth proportional to 625,310.40, 862,877.28 and 353,402.88 is: 487,667.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,310.40 : 862,877.28 = 353,402.88 : x
  2. Step 2: Convert to fraction form
    625,310.40/862,877.28 = 353,402.88/x
  3. Step 3: Cross multiply
    625,310.40x = 862,877.28 × 353,402.88
  4. Step 4: Simplify right side
    625,310.40x = 304,943,315,838.57
  5. Step 5: Solve for x
    x = 304,943,315,838.57/625,310.40
  6. Step 6: Final answer
    x = 487,667.11

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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.