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Finding the Fourth Proportional to 656.28, 983.86 and 439.48

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Solution

The fourth proportional to 656.28, 983.86 and 439.48 is: 658.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    656.28 : 983.86 = 439.48 : x
  2. Step 2: Convert to fraction form
    656.28/983.86 = 439.48/x
  3. Step 3: Cross multiply
    656.28x = 983.86 × 439.48
  4. Step 4: Simplify right side
    656.28x = 432,386.79
  5. Step 5: Solve for x
    x = 432,386.79/656.28
  6. Step 6: Final answer
    x = 658.84

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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.