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Finding the Fourth Proportional to 666,412.68, 998,713.20 and 281,841.95

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Solution

The fourth proportional to 666,412.68, 998,713.20 and 281,841.95 is: 422,379.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,412.68 : 998,713.20 = 281,841.95 : x
  2. Step 2: Convert to fraction form
    666,412.68/998,713.20 = 281,841.95/x
  3. Step 3: Cross multiply
    666,412.68x = 998,713.20 × 281,841.95
  4. Step 4: Simplify right side
    666,412.68x = 281,479,270,785.17
  5. Step 5: Solve for x
    x = 281,479,270,785.17/666,412.68
  6. Step 6: Final answer
    x = 422,379.82

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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.