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Finding the Fourth Proportional to 5,273.78, 7,910.66 and 1,987.61

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Solution

The fourth proportional to 5,273.78, 7,910.66 and 1,987.61 is: 2,981.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,273.78 : 7,910.66 = 1,987.61 : x
  2. Step 2: Convert to fraction form
    5,273.78/7,910.66 = 1,987.61/x
  3. Step 3: Cross multiply
    5,273.78x = 7,910.66 × 1,987.61
  4. Step 4: Simplify right side
    5,273.78x = 15,723,272.34
  5. Step 5: Solve for x
    x = 15,723,272.34/5,273.78
  6. Step 6: Final answer
    x = 2,981.41

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.