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Finding the Third Proportional to 391,303.50 and 558,251.25

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Solution

The third proportional to 391,303.50 and 558,251.25 is: 796,426.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,303.50 : 558,251.25 = 558,251.25 : x
  2. Step 2: Convert to fraction form
    391,303.50/558,251.25 = 558,251.25/x
  3. Step 3: Cross multiply
    391,303.50x = 558,251.25 × 558,251.25
  4. Step 4: Simplify right side
    391,303.50x = 311,644,458,126.56
  5. Step 5: Solve for x
    x = 311,644,458,126.56/391,303.50
  6. Step 6: Final answer
    x = 796,426.45

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Why These Related Problems?

These problems maintain the same ratio (1.43) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.