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Finding the Fourth Proportional to 624,871.31, 862,320.66 and 338,391.32

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Solution

The fourth proportional to 624,871.31, 862,320.66 and 338,391.32 is: 466,979.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,871.31 : 862,320.66 = 338,391.32 : x
  2. Step 2: Convert to fraction form
    624,871.31/862,320.66 = 338,391.32/x
  3. Step 3: Cross multiply
    624,871.31x = 862,320.66 × 338,391.32
  4. Step 4: Simplify right side
    624,871.31x = 291,801,822,089.07
  5. Step 5: Solve for x
    x = 291,801,822,089.07/624,871.31
  6. Step 6: Final answer
    x = 466,979.07

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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.