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Finding the Third Proportional to 358,328 and 517,980

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Solution

The third proportional to 358,328 and 517,980 is: 748,764.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,328 : 517,980 = 517,980 : x
  2. Step 2: Convert to fraction form
    358,328/517,980 = 517,980/x
  3. Step 3: Cross multiply
    358,328x = 517,980 × 517,980
  4. Step 4: Simplify right side
    358,328x = 268,303,280,400
  5. Step 5: Solve for x
    x = 268,303,280,400/358,328
  6. Step 6: Final answer
    x = 748,764.49

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Why These Related Problems?

These problems maintain the same ratio (1.45) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.