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Finding the Fourth Proportional to 1,274.44, 1,758.42 and 808.52

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Solution

The fourth proportional to 1,274.44, 1,758.42 and 808.52 is: 1,115.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,274.44 : 1,758.42 = 808.52 : x
  2. Step 2: Convert to fraction form
    1,274.44/1,758.42 = 808.52/x
  3. Step 3: Cross multiply
    1,274.44x = 1,758.42 × 808.52
  4. Step 4: Simplify right side
    1,274.44x = 1,421,717.74
  5. Step 5: Solve for x
    x = 1,421,717.74/1,274.44
  6. Step 6: Final answer
    x = 1,115.56

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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.