Home / 2,309.28-3,184.48-1,978.80

Finding the Fourth Proportional to 2,309.28, 3,184.48 and 1,978.80

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Solution

The fourth proportional to 2,309.28, 3,184.48 and 1,978.80 is: 2,728.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,309.28 : 3,184.48 = 1,978.80 : x
  2. Step 2: Convert to fraction form
    2,309.28/3,184.48 = 1,978.80/x
  3. Step 3: Cross multiply
    2,309.28x = 3,184.48 × 1,978.80
  4. Step 4: Simplify right side
    2,309.28x = 6,301,449.02
  5. Step 5: Solve for x
    x = 6,301,449.02/2,309.28
  6. Step 6: Final answer
    x = 2,728.75

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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.