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Finding the Fourth Proportional to 1,115.06, 1,672.79 and 374.78

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Solution

The fourth proportional to 1,115.06, 1,672.79 and 374.78 is: 562.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.06 : 1,672.79 = 374.78 : x
  2. Step 2: Convert to fraction form
    1,115.06/1,672.79 = 374.78/x
  3. Step 3: Cross multiply
    1,115.06x = 1,672.79 × 374.78
  4. Step 4: Simplify right side
    1,115.06x = 626,930.54
  5. Step 5: Solve for x
    x = 626,930.54/1,115.06
  6. Step 6: Final answer
    x = 562.24

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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.