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Finding the Fourth Proportional to 1,104.60, 1,655.84 and 411.08

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Solution

The fourth proportional to 1,104.60, 1,655.84 and 411.08 is: 616.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,104.60 : 1,655.84 = 411.08 : x
  2. Step 2: Convert to fraction form
    1,104.60/1,655.84 = 411.08/x
  3. Step 3: Cross multiply
    1,104.60x = 1,655.84 × 411.08
  4. Step 4: Simplify right side
    1,104.60x = 680,675.46
  5. Step 5: Solve for x
    x = 680,675.46/1,104.60
  6. Step 6: Final answer
    x = 616.22

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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.