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Finding the Fourth Proportional to 486,859.91, 729,200.90 and 281,442.89

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Solution

The fourth proportional to 486,859.91, 729,200.90 and 281,442.89 is: 421,534.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,859.91 : 729,200.90 = 281,442.89 : x
  2. Step 2: Convert to fraction form
    486,859.91/729,200.90 = 281,442.89/x
  3. Step 3: Cross multiply
    486,859.91x = 729,200.90 × 281,442.89
  4. Step 4: Simplify right side
    486,859.91x = 205,228,403,633.38
  5. Step 5: Solve for x
    x = 205,228,403,633.38/486,859.91
  6. Step 6: Final answer
    x = 421,534.82

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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.