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Finding the Fourth Proportional to 1,569.66, 2,166.39 and 871.26

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Solution

The fourth proportional to 1,569.66, 2,166.39 and 871.26 is: 1,202.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,569.66 : 2,166.39 = 871.26 : x
  2. Step 2: Convert to fraction form
    1,569.66/2,166.39 = 871.26/x
  3. Step 3: Cross multiply
    1,569.66x = 2,166.39 × 871.26
  4. Step 4: Simplify right side
    1,569.66x = 1,887,488.95
  5. Step 5: Solve for x
    x = 1,887,488.95/1,569.66
  6. Step 6: Final answer
    x = 1,202.48

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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.