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Finding the Third Proportional to 155,260 and 240,478

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Solution

The third proportional to 155,260 and 240,478 is: 372,469.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,260 : 240,478 = 240,478 : x
  2. Step 2: Convert to fraction form
    155,260/240,478 = 240,478/x
  3. Step 3: Cross multiply
    155,260x = 240,478 × 240,478
  4. Step 4: Simplify right side
    155,260x = 57,829,668,484
  5. Step 5: Solve for x
    x = 57,829,668,484/155,260
  6. Step 6: Final answer
    x = 372,469.85

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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.