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Finding the Fourth Proportional to 667,064.86, 920,549.85 and 361,141.30

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Solution

The fourth proportional to 667,064.86, 920,549.85 and 361,141.30 is: 498,375.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,064.86 : 920,549.85 = 361,141.30 : x
  2. Step 2: Convert to fraction form
    667,064.86/920,549.85 = 361,141.30/x
  3. Step 3: Cross multiply
    667,064.86x = 920,549.85 × 361,141.30
  4. Step 4: Simplify right side
    667,064.86x = 332,448,569,543.81
  5. Step 5: Solve for x
    x = 332,448,569,543.81/667,064.86
  6. Step 6: Final answer
    x = 498,375.18

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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.