Home / 431,425.04-647,139-131,904.44

Finding the Fourth Proportional to 431,425.04, 647,139 and 131,904.44

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Solution

The fourth proportional to 431,425.04, 647,139 and 131,904.44 is: 197,857.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,425.04 : 647,139 = 131,904.44 : x
  2. Step 2: Convert to fraction form
    431,425.04/647,139 = 131,904.44/x
  3. Step 3: Cross multiply
    431,425.04x = 647,139 × 131,904.44
  4. Step 4: Simplify right side
    431,425.04x = 85,360,507,397.16
  5. Step 5: Solve for x
    x = 85,360,507,397.16/431,425.04
  6. Step 6: Final answer
    x = 197,857.10

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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.