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Finding the Third Proportional to 130.64 and 281.91

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Solution

The third proportional to 130.64 and 281.91 is: 608.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    130.64 : 281.91 = 281.91 : x
  2. Step 2: Convert to fraction form
    130.64/281.91 = 281.91/x
  3. Step 3: Cross multiply
    130.64x = 281.91 × 281.91
  4. Step 4: Simplify right side
    130.64x = 79,471.13
  5. Step 5: Solve for x
    x = 79,471.13/130.64
  6. Step 6: Final answer
    x = 608.32

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.