Home / 1,988.13-2,742.98-1,148.72

Finding the Fourth Proportional to 1,988.13, 2,742.98 and 1,148.72

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Solution

The fourth proportional to 1,988.13, 2,742.98 and 1,148.72 is: 1,584.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988.13 : 2,742.98 = 1,148.72 : x
  2. Step 2: Convert to fraction form
    1,988.13/2,742.98 = 1,148.72/x
  3. Step 3: Cross multiply
    1,988.13x = 2,742.98 × 1,148.72
  4. Step 4: Simplify right side
    1,988.13x = 3,150,915.99
  5. Step 5: Solve for x
    x = 3,150,915.99/1,988.13
  6. Step 6: Final answer
    x = 1,584.87

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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.