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Finding the Fourth Proportional to 1,105.92, 1,657.80 and 412.02

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Solution

The fourth proportional to 1,105.92, 1,657.80 and 412.02 is: 617.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.92 : 1,657.80 = 412.02 : x
  2. Step 2: Convert to fraction form
    1,105.92/1,657.80 = 412.02/x
  3. Step 3: Cross multiply
    1,105.92x = 1,657.80 × 412.02
  4. Step 4: Simplify right side
    1,105.92x = 683,046.76
  5. Step 5: Solve for x
    x = 683,046.76/1,105.92
  6. Step 6: Final answer
    x = 617.63

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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.