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Finding the Fourth Proportional to 1,069.62, 1,475.82 and 872.82

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Solution

The fourth proportional to 1,069.62, 1,475.82 and 872.82 is: 1,204.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,069.62 : 1,475.82 = 872.82 : x
  2. Step 2: Convert to fraction form
    1,069.62/1,475.82 = 872.82/x
  3. Step 3: Cross multiply
    1,069.62x = 1,475.82 × 872.82
  4. Step 4: Simplify right side
    1,069.62x = 1,288,125.21
  5. Step 5: Solve for x
    x = 1,288,125.21/1,069.62
  6. Step 6: Final answer
    x = 1,204.28

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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.