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Finding the Fourth Proportional to 1,129.92, 1,558.68 and 736.26

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Solution

The fourth proportional to 1,129.92, 1,558.68 and 736.26 is: 1,015.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,129.92 : 1,558.68 = 736.26 : x
  2. Step 2: Convert to fraction form
    1,129.92/1,558.68 = 736.26/x
  3. Step 3: Cross multiply
    1,129.92x = 1,558.68 × 736.26
  4. Step 4: Simplify right side
    1,129.92x = 1,147,593.74
  5. Step 5: Solve for x
    x = 1,147,593.74/1,129.92
  6. Step 6: Final answer
    x = 1,015.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.