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Finding the Fourth Proportional to 667,367.70, 920,966.61 and 361,443.90

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Solution

The fourth proportional to 667,367.70, 920,966.61 and 361,443.90 is: 498,792.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,367.70 : 920,966.61 = 361,443.90 : x
  2. Step 2: Convert to fraction form
    667,367.70/920,966.61 = 361,443.90/x
  3. Step 3: Cross multiply
    667,367.70x = 920,966.61 × 361,443.90
  4. Step 4: Simplify right side
    667,367.70x = 332,877,763,288.18
  5. Step 5: Solve for x
    x = 332,877,763,288.18/667,367.70
  6. Step 6: Final answer
    x = 498,792.14

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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.