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Finding the Fourth Proportional to 422,332.29, 633,432.42 and 138,020.58

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Solution

The fourth proportional to 422,332.29, 633,432.42 and 138,020.58 is: 207,009.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,332.29 : 633,432.42 = 138,020.58 : x
  2. Step 2: Convert to fraction form
    422,332.29/633,432.42 = 138,020.58/x
  3. Step 3: Cross multiply
    422,332.29x = 633,432.42 × 138,020.58
  4. Step 4: Simplify right side
    422,332.29x = 87,426,709,999.20
  5. Step 5: Solve for x
    x = 87,426,709,999.20/422,332.29
  6. Step 6: Final answer
    x = 207,009.30

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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.