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Finding the Fourth Proportional to 312,529.75, 431,265.47 and 176,575.50

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Solution

The fourth proportional to 312,529.75, 431,265.47 and 176,575.50 is: 243,659.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,529.75 : 431,265.47 = 176,575.50 : x
  2. Step 2: Convert to fraction form
    312,529.75/431,265.47 = 176,575.50/x
  3. Step 3: Cross multiply
    312,529.75x = 431,265.47 × 176,575.50
  4. Step 4: Simplify right side
    312,529.75x = 76,150,915,115.11
  5. Step 5: Solve for x
    x = 76,150,915,115.11/312,529.75
  6. Step 6: Final answer
    x = 243,659.73

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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.