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Finding the Fourth Proportional to 662.92, 986.12 and 655.90

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Solution

The fourth proportional to 662.92, 986.12 and 655.90 is: 975.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    662.92 : 986.12 = 655.90 : x
  2. Step 2: Convert to fraction form
    662.92/986.12 = 655.90/x
  3. Step 3: Cross multiply
    662.92x = 986.12 × 655.90
  4. Step 4: Simplify right side
    662.92x = 646,796.11
  5. Step 5: Solve for x
    x = 646,796.11/662.92
  6. Step 6: Final answer
    x = 975.68

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.