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Finding the Fourth Proportional to 667,020.61, 920,487.30 and 361,096.87

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Solution

The fourth proportional to 667,020.61, 920,487.30 and 361,096.87 is: 498,313.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,020.61 : 920,487.30 = 361,096.87 : x
  2. Step 2: Convert to fraction form
    667,020.61/920,487.30 = 361,096.87/x
  3. Step 3: Cross multiply
    667,020.61x = 920,487.30 × 361,096.87
  4. Step 4: Simplify right side
    667,020.61x = 332,385,082,904.75
  5. Step 5: Solve for x
    x = 332,385,082,904.75/667,020.61
  6. Step 6: Final answer
    x = 498,313.06

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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.