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Finding the Fourth Proportional to 749.19, 1,123.78 and 236.19

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Solution

The fourth proportional to 749.19, 1,123.78 and 236.19 is: 354.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    749.19 : 1,123.78 = 236.19 : x
  2. Step 2: Convert to fraction form
    749.19/1,123.78 = 236.19/x
  3. Step 3: Cross multiply
    749.19x = 1,123.78 × 236.19
  4. Step 4: Simplify right side
    749.19x = 265,425.60
  5. Step 5: Solve for x
    x = 265,425.60/749.19
  6. Step 6: Final answer
    x = 354.28

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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.