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Finding the Fourth Proportional to 867.58, 1,299.18 and 559.46

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Solution

The fourth proportional to 867.58, 1,299.18 and 559.46 is: 837.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    867.58 : 1,299.18 = 559.46 : x
  2. Step 2: Convert to fraction form
    867.58/1,299.18 = 559.46/x
  3. Step 3: Cross multiply
    867.58x = 1,299.18 × 559.46
  4. Step 4: Simplify right side
    867.58x = 726,839.24
  5. Step 5: Solve for x
    x = 726,839.24/867.58
  6. Step 6: Final answer
    x = 837.78

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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.