Home / 2,987.34-4,121.85-1,808.16

Finding the Fourth Proportional to 2,987.34, 4,121.85 and 1,808.16

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Solution

The fourth proportional to 2,987.34, 4,121.85 and 1,808.16 is: 2,494.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.34 : 4,121.85 = 1,808.16 : x
  2. Step 2: Convert to fraction form
    2,987.34/4,121.85 = 1,808.16/x
  3. Step 3: Cross multiply
    2,987.34x = 4,121.85 × 1,808.16
  4. Step 4: Simplify right side
    2,987.34x = 7,452,964.30
  5. Step 5: Solve for x
    x = 7,452,964.30/2,987.34
  6. Step 6: Final answer
    x = 2,494.85

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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.