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Finding the Third Proportional to 291,314 and 393,587

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Solution

The third proportional to 291,314 and 393,587 is: 531,765.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    291,314 : 393,587 = 393,587 : x
  2. Step 2: Convert to fraction form
    291,314/393,587 = 393,587/x
  3. Step 3: Cross multiply
    291,314x = 393,587 × 393,587
  4. Step 4: Simplify right side
    291,314x = 154,910,726,569
  5. Step 5: Solve for x
    x = 154,910,726,569/291,314
  6. Step 6: Final answer
    x = 531,765.47

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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.