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Finding the Fourth Proportional to 750.38, 1,123.88 and 518.22

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Solution

The fourth proportional to 750.38, 1,123.88 and 518.22 is: 776.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    750.38 : 1,123.88 = 518.22 : x
  2. Step 2: Convert to fraction form
    750.38/1,123.88 = 518.22/x
  3. Step 3: Cross multiply
    750.38x = 1,123.88 × 518.22
  4. Step 4: Simplify right side
    750.38x = 582,417.09
  5. Step 5: Solve for x
    x = 582,417.09/750.38
  6. Step 6: Final answer
    x = 776.16

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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.