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Finding the Fourth Proportional to 930.24, 1,396.04 and 749.81

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Solution

The fourth proportional to 930.24, 1,396.04 and 749.81 is: 1,125.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.24 : 1,396.04 = 749.81 : x
  2. Step 2: Convert to fraction form
    930.24/1,396.04 = 749.81/x
  3. Step 3: Cross multiply
    930.24x = 1,396.04 × 749.81
  4. Step 4: Simplify right side
    930.24x = 1,046,761.00
  5. Step 5: Solve for x
    x = 1,046,761.00/930.24
  6. Step 6: Final answer
    x = 1,125.26

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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.