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Finding the Third Proportional to 252,328 and 390,642

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Solution

The third proportional to 252,328 and 390,642 is: 604,773.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,328 : 390,642 = 390,642 : x
  2. Step 2: Convert to fraction form
    252,328/390,642 = 390,642/x
  3. Step 3: Cross multiply
    252,328x = 390,642 × 390,642
  4. Step 4: Simplify right side
    252,328x = 152,601,172,164
  5. Step 5: Solve for x
    x = 152,601,172,164/252,328
  6. Step 6: Final answer
    x = 604,773.04

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.