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Finding the Fourth Proportional to 1,115.80, 1,671.22 and 567.04

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Solution

The fourth proportional to 1,115.80, 1,671.22 and 567.04 is: 849.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,115.80 : 1,671.22 = 567.04 : x
  2. Step 2: Convert to fraction form
    1,115.80/1,671.22 = 567.04/x
  3. Step 3: Cross multiply
    1,115.80x = 1,671.22 × 567.04
  4. Step 4: Simplify right side
    1,115.80x = 947,648.59
  5. Step 5: Solve for x
    x = 947,648.59/1,115.80
  6. Step 6: Final answer
    x = 849.30

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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.