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Finding the Fourth Proportional to 447,494.52, 671,139.27 and 127,640.31

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Solution

The fourth proportional to 447,494.52, 671,139.27 and 127,640.31 is: 191,431.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    447,494.52 : 671,139.27 = 127,640.31 : x
  2. Step 2: Convert to fraction form
    447,494.52/671,139.27 = 127,640.31/x
  3. Step 3: Cross multiply
    447,494.52x = 671,139.27 × 127,640.31
  4. Step 4: Simplify right side
    447,494.52x = 85,664,421,959.20
  5. Step 5: Solve for x
    x = 85,664,421,959.20/447,494.52
  6. Step 6: Final answer
    x = 191,431.22

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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.