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Finding the Fourth Proportional to 698.27, 962.44 and 639.44

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Solution

The fourth proportional to 698.27, 962.44 and 639.44 is: 881.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.27 : 962.44 = 639.44 : x
  2. Step 2: Convert to fraction form
    698.27/962.44 = 639.44/x
  3. Step 3: Cross multiply
    698.27x = 962.44 × 639.44
  4. Step 4: Simplify right side
    698.27x = 615,416.22
  5. Step 5: Solve for x
    x = 615,416.22/698.27
  6. Step 6: Final answer
    x = 881.35

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.