Home / 2,175.72-3,001.38-1,291.16

Finding the Fourth Proportional to 2,175.72, 3,001.38 and 1,291.16

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Solution

The fourth proportional to 2,175.72, 3,001.38 and 1,291.16 is: 1,781.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,175.72 : 3,001.38 = 1,291.16 : x
  2. Step 2: Convert to fraction form
    2,175.72/3,001.38 = 1,291.16/x
  3. Step 3: Cross multiply
    2,175.72x = 3,001.38 × 1,291.16
  4. Step 4: Simplify right side
    2,175.72x = 3,875,261.80
  5. Step 5: Solve for x
    x = 3,875,261.80/2,175.72
  6. Step 6: Final answer
    x = 1,781.14

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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.