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Finding the Third Proportional to 458 and 611.50

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Solution

The third proportional to 458 and 611.50 is: 816.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    458 : 611.50 = 611.50 : x
  2. Step 2: Convert to fraction form
    458/611.50 = 611.50/x
  3. Step 3: Cross multiply
    458x = 611.50 × 611.50
  4. Step 4: Simplify right side
    458x = 373,932.25
  5. Step 5: Solve for x
    x = 373,932.25/458
  6. Step 6: Final answer
    x = 816.45

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.