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Finding the Fourth Proportional to 997.01, 1,495.17 and 380.89

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Solution

The fourth proportional to 997.01, 1,495.17 and 380.89 is: 571.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    997.01 : 1,495.17 = 380.89 : x
  2. Step 2: Convert to fraction form
    997.01/1,495.17 = 380.89/x
  3. Step 3: Cross multiply
    997.01x = 1,495.17 × 380.89
  4. Step 4: Simplify right side
    997.01x = 569,495.30
  5. Step 5: Solve for x
    x = 569,495.30/997.01
  6. Step 6: Final answer
    x = 571.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.