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Finding the Fourth Proportional to 1,036.71, 1,556.28 and 727.70

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Solution

The fourth proportional to 1,036.71, 1,556.28 and 727.70 is: 1,092.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,036.71 : 1,556.28 = 727.70 : x
  2. Step 2: Convert to fraction form
    1,036.71/1,556.28 = 727.70/x
  3. Step 3: Cross multiply
    1,036.71x = 1,556.28 × 727.70
  4. Step 4: Simplify right side
    1,036.71x = 1,132,497.17
  5. Step 5: Solve for x
    x = 1,132,497.17/1,036.71
  6. Step 6: Final answer
    x = 1,092.40

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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.