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Finding the Fourth Proportional to 1,105.49, 1,657.87 and 374.89

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Solution

The fourth proportional to 1,105.49, 1,657.87 and 374.89 is: 562.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.49 : 1,657.87 = 374.89 : x
  2. Step 2: Convert to fraction form
    1,105.49/1,657.87 = 374.89/x
  3. Step 3: Cross multiply
    1,105.49x = 1,657.87 × 374.89
  4. Step 4: Simplify right side
    1,105.49x = 621,517.01
  5. Step 5: Solve for x
    x = 621,517.01/1,105.49
  6. Step 6: Final answer
    x = 562.21

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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.