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Finding the Fourth Proportional to 610,434.20, 915,432.60 and 310,815.20

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Solution

The fourth proportional to 610,434.20, 915,432.60 and 310,815.20 is: 466,111.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,434.20 : 915,432.60 = 310,815.20 : x
  2. Step 2: Convert to fraction form
    610,434.20/915,432.60 = 310,815.20/x
  3. Step 3: Cross multiply
    610,434.20x = 915,432.60 × 310,815.20
  4. Step 4: Simplify right side
    610,434.20x = 284,530,366,655.52
  5. Step 5: Solve for x
    x = 284,530,366,655.52/610,434.20
  6. Step 6: Final answer
    x = 466,111.44

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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.