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Finding the Fourth Proportional to 431,576.80, 647,443.02 and 132,051.76

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Solution

The fourth proportional to 431,576.80, 647,443.02 and 132,051.76 is: 198,101.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,576.80 : 647,443.02 = 132,051.76 : x
  2. Step 2: Convert to fraction form
    431,576.80/647,443.02 = 132,051.76/x
  3. Step 3: Cross multiply
    431,576.80x = 647,443.02 × 132,051.76
  4. Step 4: Simplify right side
    431,576.80x = 85,495,990,290.72
  5. Step 5: Solve for x
    x = 85,495,990,290.72/431,576.80
  6. Step 6: Final answer
    x = 198,101.45

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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.