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Finding the Fourth Proportional to 1,101.55, 1,520.17 and 604.21

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Solution

The fourth proportional to 1,101.55, 1,520.17 and 604.21 is: 833.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.55 : 1,520.17 = 604.21 : x
  2. Step 2: Convert to fraction form
    1,101.55/1,520.17 = 604.21/x
  3. Step 3: Cross multiply
    1,101.55x = 1,520.17 × 604.21
  4. Step 4: Simplify right side
    1,101.55x = 918,502.70
  5. Step 5: Solve for x
    x = 918,502.70/1,101.55
  6. Step 6: Final answer
    x = 833.83

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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.