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Finding the Third Proportional to 458.75 and 557.75

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Solution

The third proportional to 458.75 and 557.75 is: 678.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    458.75 : 557.75 = 557.75 : x
  2. Step 2: Convert to fraction form
    458.75/557.75 = 557.75/x
  3. Step 3: Cross multiply
    458.75x = 557.75 × 557.75
  4. Step 4: Simplify right side
    458.75x = 311,085.06
  5. Step 5: Solve for x
    x = 311,085.06/458.75
  6. Step 6: Final answer
    x = 678.11

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Why These Related Problems?

These problems maintain the same ratio (1.22) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.