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Finding the Fourth Proportional to 438,049.20, 656,944.20 and 171,656.40

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Solution

The fourth proportional to 438,049.20, 656,944.20 and 171,656.40 is: 257,433.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,049.20 : 656,944.20 = 171,656.40 : x
  2. Step 2: Convert to fraction form
    438,049.20/656,944.20 = 171,656.40/x
  3. Step 3: Cross multiply
    438,049.20x = 656,944.20 × 171,656.40
  4. Step 4: Simplify right side
    438,049.20x = 112,768,676,372.88
  5. Step 5: Solve for x
    x = 112,768,676,372.88/438,049.20
  6. Step 6: Final answer
    x = 257,433.81

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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.