Home / 2,987.18-4,122.58-1,660.86

Finding the Fourth Proportional to 2,987.18, 4,122.58 and 1,660.86

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Solution

The fourth proportional to 2,987.18, 4,122.58 and 1,660.86 is: 2,292.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,987.18 : 4,122.58 = 1,660.86 : x
  2. Step 2: Convert to fraction form
    2,987.18/4,122.58 = 1,660.86/x
  3. Step 3: Cross multiply
    2,987.18x = 4,122.58 × 1,660.86
  4. Step 4: Simplify right side
    2,987.18x = 6,847,028.22
  5. Step 5: Solve for x
    x = 6,847,028.22/2,987.18
  6. Step 6: Final answer
    x = 2,292.14

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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.