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Finding the Third Proportional to 461.63 and 987.31

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Solution

The third proportional to 461.63 and 987.31 is: 2,111.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.63 : 987.31 = 987.31 : x
  2. Step 2: Convert to fraction form
    461.63/987.31 = 987.31/x
  3. Step 3: Cross multiply
    461.63x = 987.31 × 987.31
  4. Step 4: Simplify right side
    461.63x = 974,785.97
  5. Step 5: Solve for x
    x = 974,785.97/461.63
  6. Step 6: Final answer
    x = 2,111.64

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Why These Related Problems?

These problems maintain the same ratio (2.14) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.