Home / 2,615.40-3,920.28-1,055.04

Finding the Fourth Proportional to 2,615.40, 3,920.28 and 1,055.04

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Solution

The fourth proportional to 2,615.40, 3,920.28 and 1,055.04 is: 1,581.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,615.40 : 3,920.28 = 1,055.04 : x
  2. Step 2: Convert to fraction form
    2,615.40/3,920.28 = 1,055.04/x
  3. Step 3: Cross multiply
    2,615.40x = 3,920.28 × 1,055.04
  4. Step 4: Simplify right side
    2,615.40x = 4,136,052.21
  5. Step 5: Solve for x
    x = 4,136,052.21/2,615.40
  6. Step 6: Final answer
    x = 1,581.42

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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.