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Finding the Fourth Proportional to 500,060.85, 690,182.34 and 378,990.96

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Solution

The fourth proportional to 500,060.85, 690,182.34 and 378,990.96 is: 523,082.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,060.85 : 690,182.34 = 378,990.96 : x
  2. Step 2: Convert to fraction form
    500,060.85/690,182.34 = 378,990.96/x
  3. Step 3: Cross multiply
    500,060.85x = 690,182.34 × 378,990.96
  4. Step 4: Simplify right side
    500,060.85x = 261,572,867,611.65
  5. Step 5: Solve for x
    x = 261,572,867,611.65/500,060.85
  6. Step 6: Final answer
    x = 523,082.08

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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.