Home / 2,987.28-4,478.04-1,888.92

Finding the Fourth Proportional to 2,987.28, 4,478.04 and 1,888.92

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Solution

The fourth proportional to 2,987.28, 4,478.04 and 1,888.92 is: 2,831.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.28 : 4,478.04 = 1,888.92 : x
  2. Step 2: Convert to fraction form
    2,987.28/4,478.04 = 1,888.92/x
  3. Step 3: Cross multiply
    2,987.28x = 4,478.04 × 1,888.92
  4. Step 4: Simplify right side
    2,987.28x = 8,458,659.32
  5. Step 5: Solve for x
    x = 8,458,659.32/2,987.28
  6. Step 6: Final answer
    x = 2,831.56

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1.5x scale

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.