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Finding the Fourth Proportional to 720,687.96, 994,549.32 and 394,002.18

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Solution

The fourth proportional to 720,687.96, 994,549.32 and 394,002.18 is: 543,722.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,687.96 : 994,549.32 = 394,002.18 : x
  2. Step 2: Convert to fraction form
    720,687.96/994,549.32 = 394,002.18/x
  3. Step 3: Cross multiply
    720,687.96x = 994,549.32 × 394,002.18
  4. Step 4: Simplify right side
    720,687.96x = 391,854,600,197.52
  5. Step 5: Solve for x
    x = 391,854,600,197.52/720,687.96
  6. Step 6: Final answer
    x = 543,722.97

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.