Home / 1,987.44-2,981.30-526.55

Finding the Fourth Proportional to 1,987.44, 2,981.30 and 526.55

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Solution

The fourth proportional to 1,987.44, 2,981.30 and 526.55 is: 789.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.44 : 2,981.30 = 526.55 : x
  2. Step 2: Convert to fraction form
    1,987.44/2,981.30 = 526.55/x
  3. Step 3: Cross multiply
    1,987.44x = 2,981.30 × 526.55
  4. Step 4: Simplify right side
    1,987.44x = 1,569,785.98
  5. Step 5: Solve for x
    x = 1,569,785.98/1,987.44
  6. Step 6: Final answer
    x = 789.85

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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.