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Finding the Fourth Proportional to 666.20, 995.24 and 662.96

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Solution

The fourth proportional to 666.20, 995.24 and 662.96 is: 990.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    666.20 : 995.24 = 662.96 : x
  2. Step 2: Convert to fraction form
    666.20/995.24 = 662.96/x
  3. Step 3: Cross multiply
    666.20x = 995.24 × 662.96
  4. Step 4: Simplify right side
    666.20x = 659,804.31
  5. Step 5: Solve for x
    x = 659,804.31/666.20
  6. Step 6: Final answer
    x = 990.40

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1.5x scale

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.