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Finding the Fourth Proportional to 398,911.30, 598,243.02 and 132,607.60

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Solution

The fourth proportional to 398,911.30, 598,243.02 and 132,607.60 is: 198,870.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,911.30 : 598,243.02 = 132,607.60 : x
  2. Step 2: Convert to fraction form
    398,911.30/598,243.02 = 132,607.60/x
  3. Step 3: Cross multiply
    398,911.30x = 598,243.02 × 132,607.60
  4. Step 4: Simplify right side
    398,911.30x = 79,331,571,098.95
  5. Step 5: Solve for x
    x = 79,331,571,098.95/398,911.30
  6. Step 6: Final answer
    x = 198,870.20

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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.