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Finding the Fourth Proportional to 447,985.80, 671,978.70 and 132,445.80

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Solution

The fourth proportional to 447,985.80, 671,978.70 and 132,445.80 is: 198,668.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,985.80 : 671,978.70 = 132,445.80 : x
  2. Step 2: Convert to fraction form
    447,985.80/671,978.70 = 132,445.80/x
  3. Step 3: Cross multiply
    447,985.80x = 671,978.70 × 132,445.80
  4. Step 4: Simplify right side
    447,985.80x = 89,000,756,504.46
  5. Step 5: Solve for x
    x = 89,000,756,504.46/447,985.80
  6. Step 6: Final answer
    x = 198,668.70

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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.