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Finding the Third Proportional to 488.74 and 920.53

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Solution

The third proportional to 488.74 and 920.53 is: 1,733.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    488.74 : 920.53 = 920.53 : x
  2. Step 2: Convert to fraction form
    488.74/920.53 = 920.53/x
  3. Step 3: Cross multiply
    488.74x = 920.53 × 920.53
  4. Step 4: Simplify right side
    488.74x = 847,377.78
  5. Step 5: Solve for x
    x = 847,377.78/488.74
  6. Step 6: Final answer
    x = 1,733.79

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Why These Related Problems?

These problems maintain the same ratio (1.88) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.