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Finding the Fourth Proportional to 667,671.88, 921,377.28 and 361,739.76

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Solution

The fourth proportional to 667,671.88, 921,377.28 and 361,739.76 is: 499,195.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,671.88 : 921,377.28 = 361,739.76 : x
  2. Step 2: Convert to fraction form
    667,671.88/921,377.28 = 361,739.76/x
  3. Step 3: Cross multiply
    667,671.88x = 921,377.28 × 361,739.76
  4. Step 4: Simplify right side
    667,671.88x = 333,298,796,136.65
  5. Step 5: Solve for x
    x = 333,298,796,136.65/667,671.88
  6. Step 6: Final answer
    x = 499,195.50

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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.