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Finding the Fourth Proportional to 398,681.60, 598,051.20 and 132,627.20

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Solution

The fourth proportional to 398,681.60, 598,051.20 and 132,627.20 is: 198,950.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,681.60 : 598,051.20 = 132,627.20 : x
  2. Step 2: Convert to fraction form
    398,681.60/598,051.20 = 132,627.20/x
  3. Step 3: Cross multiply
    398,681.60x = 598,051.20 × 132,627.20
  4. Step 4: Simplify right side
    398,681.60x = 79,317,856,112.64
  5. Step 5: Solve for x
    x = 79,317,856,112.64/398,681.60
  6. Step 6: Final answer
    x = 198,950.38

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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.