Home / 2,175.40-3,002.16-1,291.24

Finding the Fourth Proportional to 2,175.40, 3,002.16 and 1,291.24

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Solution

The fourth proportional to 2,175.40, 3,002.16 and 1,291.24 is: 1,781.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,175.40 : 3,002.16 = 1,291.24 : x
  2. Step 2: Convert to fraction form
    2,175.40/3,002.16 = 1,291.24/x
  3. Step 3: Cross multiply
    2,175.40x = 3,002.16 × 1,291.24
  4. Step 4: Simplify right side
    2,175.40x = 3,876,509.08
  5. Step 5: Solve for x
    x = 3,876,509.08/2,175.40
  6. Step 6: Final answer
    x = 1,781.98

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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.