Home / 2,810.30-3,878.28-1,615.55

Finding the Fourth Proportional to 2,810.30, 3,878.28 and 1,615.55

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Solution

The fourth proportional to 2,810.30, 3,878.28 and 1,615.55 is: 2,229.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,810.30 : 3,878.28 = 1,615.55 : x
  2. Step 2: Convert to fraction form
    2,810.30/3,878.28 = 1,615.55/x
  3. Step 3: Cross multiply
    2,810.30x = 3,878.28 × 1,615.55
  4. Step 4: Simplify right side
    2,810.30x = 6,265,535.86
  5. Step 5: Solve for x
    x = 6,265,535.86/2,810.30
  6. Step 6: Final answer
    x = 2,229.49

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1.5x scale

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.