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Finding the Fourth Proportional to 449,490.72, 674,235.76 and 133,939.52

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Solution

The fourth proportional to 449,490.72, 674,235.76 and 133,939.52 is: 200,909.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    449,490.72 : 674,235.76 = 133,939.52 : x
  2. Step 2: Convert to fraction form
    449,490.72/674,235.76 = 133,939.52/x
  3. Step 3: Cross multiply
    449,490.72x = 674,235.76 × 133,939.52
  4. Step 4: Simplify right side
    449,490.72x = 90,306,814,061.24
  5. Step 5: Solve for x
    x = 90,306,814,061.24/449,490.72
  6. Step 6: Final answer
    x = 200,909.18

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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.