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Finding the Fourth Proportional to 583.28, 873.80 and 439.60

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Solution

The fourth proportional to 583.28, 873.80 and 439.60 is: 658.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    583.28 : 873.80 = 439.60 : x
  2. Step 2: Convert to fraction form
    583.28/873.80 = 439.60/x
  3. Step 3: Cross multiply
    583.28x = 873.80 × 439.60
  4. Step 4: Simplify right side
    583.28x = 384,122.48
  5. Step 5: Solve for x
    x = 384,122.48/583.28
  6. Step 6: Final answer
    x = 658.56

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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.