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Finding the Fourth Proportional to 836.39, 1,253.69 and 605.17

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Solution

The fourth proportional to 836.39, 1,253.69 and 605.17 is: 907.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.39 : 1,253.69 = 605.17 : x
  2. Step 2: Convert to fraction form
    836.39/1,253.69 = 605.17/x
  3. Step 3: Cross multiply
    836.39x = 1,253.69 × 605.17
  4. Step 4: Simplify right side
    836.39x = 758,696.39
  5. Step 5: Solve for x
    x = 758,696.39/836.39
  6. Step 6: Final answer
    x = 907.11

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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.