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Finding the Fourth Proportional to 918.29, 1,377.63 and 268.97

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Solution

The fourth proportional to 918.29, 1,377.63 and 268.97 is: 403.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    918.29 : 1,377.63 = 268.97 : x
  2. Step 2: Convert to fraction form
    918.29/1,377.63 = 268.97/x
  3. Step 3: Cross multiply
    918.29x = 1,377.63 × 268.97
  4. Step 4: Simplify right side
    918.29x = 370,541.14
  5. Step 5: Solve for x
    x = 370,541.14/918.29
  6. Step 6: Final answer
    x = 403.51

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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.