Home / 1,851.70-2,778.20-1,157.58

Finding the Fourth Proportional to 1,851.70, 2,778.20 and 1,157.58

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Solution

The fourth proportional to 1,851.70, 2,778.20 and 1,157.58 is: 1,736.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,851.70 : 2,778.20 = 1,157.58 : x
  2. Step 2: Convert to fraction form
    1,851.70/2,778.20 = 1,157.58/x
  3. Step 3: Cross multiply
    1,851.70x = 2,778.20 × 1,157.58
  4. Step 4: Simplify right side
    1,851.70x = 3,215,988.76
  5. Step 5: Solve for x
    x = 3,215,988.76/1,851.70
  6. Step 6: Final answer
    x = 1,736.78

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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.