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Finding the Fourth Proportional to 615,143.52, 923,565.20 and 425,135.75

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Solution

The fourth proportional to 615,143.52, 923,565.20 and 425,135.75 is: 638,291.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,143.52 : 923,565.20 = 425,135.75 : x
  2. Step 2: Convert to fraction form
    615,143.52/923,565.20 = 425,135.75/x
  3. Step 3: Cross multiply
    615,143.52x = 923,565.20 × 425,135.75
  4. Step 4: Simplify right side
    615,143.52x = 392,640,577,232.40
  5. Step 5: Solve for x
    x = 392,640,577,232.40/615,143.52
  6. Step 6: Final answer
    x = 638,291.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.