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Finding the Fourth Proportional to 667,287.96, 920,857.88 and 361,366.72

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Solution

The fourth proportional to 667,287.96, 920,857.88 and 361,366.72 is: 498,686.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,287.96 : 920,857.88 = 361,366.72 : x
  2. Step 2: Convert to fraction form
    667,287.96/920,857.88 = 361,366.72/x
  3. Step 3: Cross multiply
    667,287.96x = 920,857.88 × 361,366.72
  4. Step 4: Simplify right side
    667,287.96x = 332,767,391,681.75
  5. Step 5: Solve for x
    x = 332,767,391,681.75/667,287.96
  6. Step 6: Final answer
    x = 498,686.34

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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.