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Finding the Fourth Proportional to 917.44, 1,376.39 and 268.18

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Solution

The fourth proportional to 917.44, 1,376.39 and 268.18 is: 402.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    917.44 : 1,376.39 = 268.18 : x
  2. Step 2: Convert to fraction form
    917.44/1,376.39 = 268.18/x
  3. Step 3: Cross multiply
    917.44x = 1,376.39 × 268.18
  4. Step 4: Simplify right side
    917.44x = 369,115.49
  5. Step 5: Solve for x
    x = 369,115.49/917.44
  6. Step 6: Final answer
    x = 402.33

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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.