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Finding the Fourth Proportional to 918.26, 1,377.39 and 734.79

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Solution

The fourth proportional to 918.26, 1,377.39 and 734.79 is: 1,102.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.26 : 1,377.39 = 734.79 : x
  2. Step 2: Convert to fraction form
    918.26/1,377.39 = 734.79/x
  3. Step 3: Cross multiply
    918.26x = 1,377.39 × 734.79
  4. Step 4: Simplify right side
    918.26x = 1,012,092.40
  5. Step 5: Solve for x
    x = 1,012,092.40/918.26
  6. Step 6: Final answer
    x = 1,102.19

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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.