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Finding the Fourth Proportional to 422,697.52, 634,129.16 and 156,460.28

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Solution

The fourth proportional to 422,697.52, 634,129.16 and 156,460.28 is: 234,721.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,697.52 : 634,129.16 = 156,460.28 : x
  2. Step 2: Convert to fraction form
    422,697.52/634,129.16 = 156,460.28/x
  3. Step 3: Cross multiply
    422,697.52x = 634,129.16 × 156,460.28
  4. Step 4: Simplify right side
    422,697.52x = 99,216,025,929.76
  5. Step 5: Solve for x
    x = 99,216,025,929.76/422,697.52
  6. Step 6: Final answer
    x = 234,721.10

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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.