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Finding the Fourth Proportional to 431,043.70, 646,565.55 and 168,387.70

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Solution

The fourth proportional to 431,043.70, 646,565.55 and 168,387.70 is: 252,581.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,043.70 : 646,565.55 = 168,387.70 : x
  2. Step 2: Convert to fraction form
    431,043.70/646,565.55 = 168,387.70/x
  3. Step 3: Cross multiply
    431,043.70x = 646,565.55 × 168,387.70
  4. Step 4: Simplify right side
    431,043.70x = 108,873,685,863.74
  5. Step 5: Solve for x
    x = 108,873,685,863.74/431,043.70
  6. Step 6: Final answer
    x = 252,581.55

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Similar ratio
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1.5x scale

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.