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Finding the Fourth Proportional to 312,523.20, 431,287.20 and 176,529.60

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Solution

The fourth proportional to 312,523.20, 431,287.20 and 176,529.60 is: 243,613.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,523.20 : 431,287.20 = 176,529.60 : x
  2. Step 2: Convert to fraction form
    312,523.20/431,287.20 = 176,529.60/x
  3. Step 3: Cross multiply
    312,523.20x = 431,287.20 × 176,529.60
  4. Step 4: Simplify right side
    312,523.20x = 76,134,956,901.12
  5. Step 5: Solve for x
    x = 76,134,956,901.12/312,523.20
  6. Step 6: Final answer
    x = 243,613.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.