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Finding the Fourth Proportional to 578.24, 868.10 and 456.60

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Solution

The fourth proportional to 578.24, 868.10 and 456.60 is: 685.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.24 : 868.10 = 456.60 : x
  2. Step 2: Convert to fraction form
    578.24/868.10 = 456.60/x
  3. Step 3: Cross multiply
    578.24x = 868.10 × 456.60
  4. Step 4: Simplify right side
    578.24x = 396,372.18
  5. Step 5: Solve for x
    x = 396,372.18/578.24
  6. Step 6: Final answer
    x = 685.49

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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.