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Finding the Fourth Proportional to 1,385.80, 2,079.06 and 736

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Solution

The fourth proportional to 1,385.80, 2,079.06 and 736 is: 1,104.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.80 : 2,079.06 = 736 : x
  2. Step 2: Convert to fraction form
    1,385.80/2,079.06 = 736/x
  3. Step 3: Cross multiply
    1,385.80x = 2,079.06 × 736
  4. Step 4: Simplify right side
    1,385.80x = 1,530,188.16
  5. Step 5: Solve for x
    x = 1,530,188.16/1,385.80
  6. Step 6: Final answer
    x = 1,104.19

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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.