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Finding the Fourth Proportional to 331,970.40, 498,020.40 and 132,256.80

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Solution

The fourth proportional to 331,970.40, 498,020.40 and 132,256.80 is: 198,411.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    331,970.40 : 498,020.40 = 132,256.80 : x
  2. Step 2: Convert to fraction form
    331,970.40/498,020.40 = 132,256.80/x
  3. Step 3: Cross multiply
    331,970.40x = 498,020.40 × 132,256.80
  4. Step 4: Simplify right side
    331,970.40x = 65,866,584,438.72
  5. Step 5: Solve for x
    x = 65,866,584,438.72/331,970.40
  6. Step 6: Final answer
    x = 198,411.02

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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.