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Finding the Fourth Proportional to 1,148.06, 1,720.85 and 736.35

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Solution

The fourth proportional to 1,148.06, 1,720.85 and 736.35 is: 1,103.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,148.06 : 1,720.85 = 736.35 : x
  2. Step 2: Convert to fraction form
    1,148.06/1,720.85 = 736.35/x
  3. Step 3: Cross multiply
    1,148.06x = 1,720.85 × 736.35
  4. Step 4: Simplify right side
    1,148.06x = 1,267,144.22
  5. Step 5: Solve for x
    x = 1,267,144.22/1,148.06
  6. Step 6: Final answer
    x = 1,103.73

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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.