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Finding the Third Proportional to 402.47 and 626.48

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Solution

The third proportional to 402.47 and 626.48 is: 975.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.47 : 626.48 = 626.48 : x
  2. Step 2: Convert to fraction form
    402.47/626.48 = 626.48/x
  3. Step 3: Cross multiply
    402.47x = 626.48 × 626.48
  4. Step 4: Simplify right side
    402.47x = 392,482.67
  5. Step 5: Solve for x
    x = 392,482.67/402.47
  6. Step 6: Final answer
    x = 975.19

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.