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Finding the Fourth Proportional to 866.48, 1,299.36 and 543.44

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Solution

The fourth proportional to 866.48, 1,299.36 and 543.44 is: 814.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    866.48 : 1,299.36 = 543.44 : x
  2. Step 2: Convert to fraction form
    866.48/1,299.36 = 543.44/x
  3. Step 3: Cross multiply
    866.48x = 1,299.36 × 543.44
  4. Step 4: Simplify right side
    866.48x = 706,124.20
  5. Step 5: Solve for x
    x = 706,124.20/866.48
  6. Step 6: Final answer
    x = 814.93

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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.