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Finding the Fourth Proportional to 431,701.40, 647,552.10 and 136,213.40

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Solution

The fourth proportional to 431,701.40, 647,552.10 and 136,213.40 is: 204,320.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,701.40 : 647,552.10 = 136,213.40 : x
  2. Step 2: Convert to fraction form
    431,701.40/647,552.10 = 136,213.40/x
  3. Step 3: Cross multiply
    431,701.40x = 647,552.10 × 136,213.40
  4. Step 4: Simplify right side
    431,701.40x = 88,205,273,218.14
  5. Step 5: Solve for x
    x = 88,205,273,218.14/431,701.40
  6. Step 6: Final answer
    x = 204,320.10

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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.