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Finding the Fourth Proportional to 431,080.79, 646,621.18 and 131,562.93

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Solution

The fourth proportional to 431,080.79, 646,621.18 and 131,562.93 is: 197,344.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,080.79 : 646,621.18 = 131,562.93 : x
  2. Step 2: Convert to fraction form
    431,080.79/646,621.18 = 131,562.93/x
  3. Step 3: Cross multiply
    431,080.79x = 646,621.18 × 131,562.93
  4. Step 4: Simplify right side
    431,080.79x = 85,071,379,136.78
  5. Step 5: Solve for x
    x = 85,071,379,136.78/431,080.79
  6. Step 6: Final answer
    x = 197,344.40

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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.