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Finding the Fourth Proportional to 667,381.20, 921,000.92 and 380,895.52

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Solution

The fourth proportional to 667,381.20, 921,000.92 and 380,895.52 is: 525,644.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,381.20 : 921,000.92 = 380,895.52 : x
  2. Step 2: Convert to fraction form
    667,381.20/921,000.92 = 380,895.52/x
  3. Step 3: Cross multiply
    667,381.20x = 921,000.92 × 380,895.52
  4. Step 4: Simplify right side
    667,381.20x = 350,805,124,343.88
  5. Step 5: Solve for x
    x = 350,805,124,343.88/667,381.20
  6. Step 6: Final answer
    x = 525,644.30

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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.