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Finding the Fourth Proportional to 625,007.80, 862,563.78 and 353,125.60

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Solution

The fourth proportional to 625,007.80, 862,563.78 and 353,125.60 is: 487,343.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,007.80 : 862,563.78 = 353,125.60 : x
  2. Step 2: Convert to fraction form
    625,007.80/862,563.78 = 353,125.60/x
  3. Step 3: Cross multiply
    625,007.80x = 862,563.78 × 353,125.60
  4. Step 4: Simplify right side
    625,007.80x = 304,593,352,350.77
  5. Step 5: Solve for x
    x = 304,593,352,350.77/625,007.80
  6. Step 6: Final answer
    x = 487,343.28

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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.