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Finding the Fourth Proportional to 431,287.92, 647,030.30 and 131,811.08

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Solution

The fourth proportional to 431,287.92, 647,030.30 and 131,811.08 is: 197,746.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,287.92 : 647,030.30 = 131,811.08 : x
  2. Step 2: Convert to fraction form
    431,287.92/647,030.30 = 131,811.08/x
  3. Step 3: Cross multiply
    431,287.92x = 647,030.30 × 131,811.08
  4. Step 4: Simplify right side
    431,287.92x = 85,285,758,741.52
  5. Step 5: Solve for x
    x = 85,285,758,741.52/431,287.92
  6. Step 6: Final answer
    x = 197,746.69

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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.