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Finding the Fourth Proportional to 519,980.38, 779,871.92 and 253,472.86

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Solution

The fourth proportional to 519,980.38, 779,871.92 and 253,472.86 is: 380,161.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,980.38 : 779,871.92 = 253,472.86 : x
  2. Step 2: Convert to fraction form
    519,980.38/779,871.92 = 253,472.86/x
  3. Step 3: Cross multiply
    519,980.38x = 779,871.92 × 253,472.86
  4. Step 4: Simplify right side
    519,980.38x = 197,676,365,996.09
  5. Step 5: Solve for x
    x = 197,676,365,996.09/519,980.38
  6. Step 6: Final answer
    x = 380,161.20

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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.