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Finding the Fourth Proportional to 447,505.72, 671,191.90 and 147,987.87

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Solution

The fourth proportional to 447,505.72, 671,191.90 and 147,987.87 is: 221,959.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,505.72 : 671,191.90 = 147,987.87 : x
  2. Step 2: Convert to fraction form
    447,505.72/671,191.90 = 147,987.87/x
  3. Step 3: Cross multiply
    447,505.72x = 671,191.90 × 147,987.87
  4. Step 4: Simplify right side
    447,505.72x = 99,328,259,642.25
  5. Step 5: Solve for x
    x = 99,328,259,642.25/447,505.72
  6. Step 6: Final answer
    x = 221,959.75

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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.