Home / 2,405.16-3,316.14-1,987.20

Finding the Fourth Proportional to 2,405.16, 3,316.14 and 1,987.20

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Solution

The fourth proportional to 2,405.16, 3,316.14 and 1,987.20 is: 2,739.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,405.16 : 3,316.14 = 1,987.20 : x
  2. Step 2: Convert to fraction form
    2,405.16/3,316.14 = 1,987.20/x
  3. Step 3: Cross multiply
    2,405.16x = 3,316.14 × 1,987.20
  4. Step 4: Simplify right side
    2,405.16x = 6,589,833.41
  5. Step 5: Solve for x
    x = 6,589,833.41/2,405.16
  6. Step 6: Final answer
    x = 2,739.87

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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.