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Finding the Fourth Proportional to 402,619.80, 604,005.90 and 132,763.44

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Solution

The fourth proportional to 402,619.80, 604,005.90 and 132,763.44 is: 199,170.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,619.80 : 604,005.90 = 132,763.44 : x
  2. Step 2: Convert to fraction form
    402,619.80/604,005.90 = 132,763.44/x
  3. Step 3: Cross multiply
    402,619.80x = 604,005.90 × 132,763.44
  4. Step 4: Simplify right side
    402,619.80x = 80,189,901,064.30
  5. Step 5: Solve for x
    x = 80,189,901,064.30/402,619.80
  6. Step 6: Final answer
    x = 199,170.29

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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.