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Finding the Fourth Proportional to 398,679.60, 598,048.20 and 132,625.20

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Solution

The fourth proportional to 398,679.60, 598,048.20 and 132,625.20 is: 198,947.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,679.60 : 598,048.20 = 132,625.20 : x
  2. Step 2: Convert to fraction form
    398,679.60/598,048.20 = 132,625.20/x
  3. Step 3: Cross multiply
    398,679.60x = 598,048.20 × 132,625.20
  4. Step 4: Simplify right side
    398,679.60x = 79,316,262,134.64
  5. Step 5: Solve for x
    x = 79,316,262,134.64/398,679.60
  6. Step 6: Final answer
    x = 198,947.38

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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.