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Finding the Fourth Proportional to 425,357.43, 587,034.61 and 317,740.62

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Solution

The fourth proportional to 425,357.43, 587,034.61 and 317,740.62 is: 438,512.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,357.43 : 587,034.61 = 317,740.62 : x
  2. Step 2: Convert to fraction form
    425,357.43/587,034.61 = 317,740.62/x
  3. Step 3: Cross multiply
    425,357.43x = 587,034.61 × 317,740.62
  4. Step 4: Simplify right side
    425,357.43x = 186,524,740,942.86
  5. Step 5: Solve for x
    x = 186,524,740,942.86/425,357.43
  6. Step 6: Final answer
    x = 438,512.95

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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.