Home / 1,981.89-2,735.34-1,274.76

Finding the Fourth Proportional to 1,981.89, 2,735.34 and 1,274.76

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Solution

The fourth proportional to 1,981.89, 2,735.34 and 1,274.76 is: 1,759.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981.89 : 2,735.34 = 1,274.76 : x
  2. Step 2: Convert to fraction form
    1,981.89/2,735.34 = 1,274.76/x
  3. Step 3: Cross multiply
    1,981.89x = 2,735.34 × 1,274.76
  4. Step 4: Simplify right side
    1,981.89x = 3,486,897.24
  5. Step 5: Solve for x
    x = 3,486,897.24/1,981.89
  6. Step 6: Final answer
    x = 1,759.38

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Find fourth proportional to 1,982.89, 2,736.72 and 1,275.76
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.