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Finding the Fourth Proportional to 423,572.52, 635,437.32 and 139,278.96

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Solution

The fourth proportional to 423,572.52, 635,437.32 and 139,278.96 is: 208,944.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,572.52 : 635,437.32 = 139,278.96 : x
  2. Step 2: Convert to fraction form
    423,572.52/635,437.32 = 139,278.96/x
  3. Step 3: Cross multiply
    423,572.52x = 635,437.32 × 139,278.96
  4. Step 4: Simplify right side
    423,572.52x = 88,503,049,074.79
  5. Step 5: Solve for x
    x = 88,503,049,074.79/423,572.52
  6. Step 6: Final answer
    x = 208,944.27

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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.