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Finding the Fourth Proportional to 447,987.80, 671,981.70 and 132,447.80

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Solution

The fourth proportional to 447,987.80, 671,981.70 and 132,447.80 is: 198,671.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,987.80 : 671,981.70 = 132,447.80 : x
  2. Step 2: Convert to fraction form
    447,987.80/671,981.70 = 132,447.80/x
  3. Step 3: Cross multiply
    447,987.80x = 671,981.70 × 132,447.80
  4. Step 4: Simplify right side
    447,987.80x = 89,002,497,805.26
  5. Step 5: Solve for x
    x = 89,002,497,805.26/447,987.80
  6. Step 6: Final answer
    x = 198,671.70

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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.