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Finding the Fourth Proportional to 1,101.52, 1,648.84 and 711

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Solution

The fourth proportional to 1,101.52, 1,648.84 and 711 is: 1,064.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.52 : 1,648.84 = 711 : x
  2. Step 2: Convert to fraction form
    1,101.52/1,648.84 = 711/x
  3. Step 3: Cross multiply
    1,101.52x = 1,648.84 × 711
  4. Step 4: Simplify right side
    1,101.52x = 1,172,321.69
  5. Step 5: Solve for x
    x = 1,172,321.69/1,101.52
  6. Step 6: Final answer
    x = 1,064.28

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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.