Home / 1,987.40-2,981.16-526.52

Finding the Fourth Proportional to 1,987.40, 2,981.16 and 526.52

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Solution

The fourth proportional to 1,987.40, 2,981.16 and 526.52 is: 789.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,987.40 : 2,981.16 = 526.52 : x
  2. Step 2: Convert to fraction form
    1,987.40/2,981.16 = 526.52/x
  3. Step 3: Cross multiply
    1,987.40x = 2,981.16 × 526.52
  4. Step 4: Simplify right side
    1,987.40x = 1,569,640.36
  5. Step 5: Solve for x
    x = 1,569,640.36/1,987.40
  6. Step 6: Final answer
    x = 789.80

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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.