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Finding the Fourth Proportional to 1,105.05, 1,657.48 and 374.55

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Solution

The fourth proportional to 1,105.05, 1,657.48 and 374.55 is: 561.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.05 : 1,657.48 = 374.55 : x
  2. Step 2: Convert to fraction form
    1,105.05/1,657.48 = 374.55/x
  3. Step 3: Cross multiply
    1,105.05x = 1,657.48 × 374.55
  4. Step 4: Simplify right side
    1,105.05x = 620,809.13
  5. Step 5: Solve for x
    x = 620,809.13/1,105.05
  6. Step 6: Final answer
    x = 561.79

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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.