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Finding the Fourth Proportional to 1,349.71, 1,863.11 and 908.87

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Solution

The fourth proportional to 1,349.71, 1,863.11 and 908.87 is: 1,254.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,349.71 : 1,863.11 = 908.87 : x
  2. Step 2: Convert to fraction form
    1,349.71/1,863.11 = 908.87/x
  3. Step 3: Cross multiply
    1,349.71x = 1,863.11 × 908.87
  4. Step 4: Simplify right side
    1,349.71x = 1,693,317.74
  5. Step 5: Solve for x
    x = 1,693,317.74/1,349.71
  6. Step 6: Final answer
    x = 1,254.58

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.