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Finding the Third Proportional to 391,693.50 and 528,489

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Solution

The third proportional to 391,693.50 and 528,489 is: 713,059.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,693.50 : 528,489 = 528,489 : x
  2. Step 2: Convert to fraction form
    391,693.50/528,489 = 528,489/x
  3. Step 3: Cross multiply
    391,693.50x = 528,489 × 528,489
  4. Step 4: Simplify right side
    391,693.50x = 279,300,623,121
  5. Step 5: Solve for x
    x = 279,300,623,121/391,693.50
  6. Step 6: Final answer
    x = 713,059.12

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.