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Finding the Fourth Proportional to 749.13, 1,123.87 and 236.13

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Solution

The fourth proportional to 749.13, 1,123.87 and 236.13 is: 354.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.13 : 1,123.87 = 236.13 : x
  2. Step 2: Convert to fraction form
    749.13/1,123.87 = 236.13/x
  3. Step 3: Cross multiply
    749.13x = 1,123.87 × 236.13
  4. Step 4: Simplify right side
    749.13x = 265,379.42
  5. Step 5: Solve for x
    x = 265,379.42/749.13
  6. Step 6: Final answer
    x = 354.25

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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.