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Finding the Fourth Proportional to 1,129.61, 1,558.39 and 736.62

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Solution

The fourth proportional to 1,129.61, 1,558.39 and 736.62 is: 1,016.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,129.61 : 1,558.39 = 736.62 : x
  2. Step 2: Convert to fraction form
    1,129.61/1,558.39 = 736.62/x
  3. Step 3: Cross multiply
    1,129.61x = 1,558.39 × 736.62
  4. Step 4: Simplify right side
    1,129.61x = 1,147,941.24
  5. Step 5: Solve for x
    x = 1,147,941.24/1,129.61
  6. Step 6: Final answer
    x = 1,016.23

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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.