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Finding the Fourth Proportional to 1,291.17, 1,936.97 and 597.55

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Solution

The fourth proportional to 1,291.17, 1,936.97 and 597.55 is: 896.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.17 : 1,936.97 = 597.55 : x
  2. Step 2: Convert to fraction form
    1,291.17/1,936.97 = 597.55/x
  3. Step 3: Cross multiply
    1,291.17x = 1,936.97 × 597.55
  4. Step 4: Simplify right side
    1,291.17x = 1,157,436.42
  5. Step 5: Solve for x
    x = 1,157,436.42/1,291.17
  6. Step 6: Final answer
    x = 896.42

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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.