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Finding the Fourth Proportional to 1,104.71, 1,657.21 and 374.09

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Solution

The fourth proportional to 1,104.71, 1,657.21 and 374.09 is: 561.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,104.71 : 1,657.21 = 374.09 : x
  2. Step 2: Convert to fraction form
    1,104.71/1,657.21 = 374.09/x
  3. Step 3: Cross multiply
    1,104.71x = 1,657.21 × 374.09
  4. Step 4: Simplify right side
    1,104.71x = 619,937.17
  5. Step 5: Solve for x
    x = 619,937.17/1,104.71
  6. Step 6: Final answer
    x = 561.18

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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.