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Finding the Fourth Proportional to 667,423.10, 921,036.56 and 361,491.87

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Solution

The fourth proportional to 667,423.10, 921,036.56 and 361,491.87 is: 498,854.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,423.10 : 921,036.56 = 361,491.87 : x
  2. Step 2: Convert to fraction form
    667,423.10/921,036.56 = 361,491.87/x
  3. Step 3: Cross multiply
    667,423.10x = 921,036.56 × 361,491.87
  4. Step 4: Simplify right side
    667,423.10x = 332,947,230,059.20
  5. Step 5: Solve for x
    x = 332,947,230,059.20/667,423.10
  6. Step 6: Final answer
    x = 498,854.82

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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.