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Finding the Third Proportional to 158,440 and 247,380

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Solution

The third proportional to 158,440 and 247,380 is: 386,246.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,440 : 247,380 = 247,380 : x
  2. Step 2: Convert to fraction form
    158,440/247,380 = 247,380/x
  3. Step 3: Cross multiply
    158,440x = 247,380 × 247,380
  4. Step 4: Simplify right side
    158,440x = 61,196,864,400
  5. Step 5: Solve for x
    x = 61,196,864,400/158,440
  6. Step 6: Final answer
    x = 386,246.30

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.