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Finding the Fourth Proportional to 422,459.52, 633,689.24 and 141,976.76

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Solution

The fourth proportional to 422,459.52, 633,689.24 and 141,976.76 is: 212,965.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,459.52 : 633,689.24 = 141,976.76 : x
  2. Step 2: Convert to fraction form
    422,459.52/633,689.24 = 141,976.76/x
  3. Step 3: Cross multiply
    422,459.52x = 633,689.24 × 141,976.76
  4. Step 4: Simplify right side
    422,459.52x = 89,969,145,142.06
  5. Step 5: Solve for x
    x = 89,969,145,142.06/422,459.52
  6. Step 6: Final answer
    x = 212,965.13

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1.5x scale

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.