Home / 2,987.40-4,121.67-1,792.14

Finding the Fourth Proportional to 2,987.40, 4,121.67 and 1,792.14

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Solution

The fourth proportional to 2,987.40, 4,121.67 and 1,792.14 is: 2,472.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.40 : 4,121.67 = 1,792.14 : x
  2. Step 2: Convert to fraction form
    2,987.40/4,121.67 = 1,792.14/x
  3. Step 3: Cross multiply
    2,987.40x = 4,121.67 × 1,792.14
  4. Step 4: Simplify right side
    2,987.40x = 7,386,609.67
  5. Step 5: Solve for x
    x = 7,386,609.67/2,987.40
  6. Step 6: Final answer
    x = 2,472.59

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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.