Home / 2,987.67-4,122.66-1,808.92

Finding the Fourth Proportional to 2,987.67, 4,122.66 and 1,808.92

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Solution

The fourth proportional to 2,987.67, 4,122.66 and 1,808.92 is: 2,496.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.67 : 4,122.66 = 1,808.92 : x
  2. Step 2: Convert to fraction form
    2,987.67/4,122.66 = 1,808.92/x
  3. Step 3: Cross multiply
    2,987.67x = 4,122.66 × 1,808.92
  4. Step 4: Simplify right side
    2,987.67x = 7,457,562.13
  5. Step 5: Solve for x
    x = 7,457,562.13/2,987.67
  6. Step 6: Final answer
    x = 2,496.11

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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.