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Finding the Third Proportional to 417.75 and 556.13

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Solution

The third proportional to 417.75 and 556.13 is: 740.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.75 : 556.13 = 556.13 : x
  2. Step 2: Convert to fraction form
    417.75/556.13 = 556.13/x
  3. Step 3: Cross multiply
    417.75x = 556.13 × 556.13
  4. Step 4: Simplify right side
    417.75x = 309,275.02
  5. Step 5: Solve for x
    x = 309,275.02/417.75
  6. Step 6: Final answer
    x = 740.34

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.