Home / 2,175.17-3,001.73-1,291.05

Finding the Fourth Proportional to 2,175.17, 3,001.73 and 1,291.05

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Solution

The fourth proportional to 2,175.17, 3,001.73 and 1,291.05 is: 1,781.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,175.17 : 3,001.73 = 1,291.05 : x
  2. Step 2: Convert to fraction form
    2,175.17/3,001.73 = 1,291.05/x
  3. Step 3: Cross multiply
    2,175.17x = 3,001.73 × 1,291.05
  4. Step 4: Simplify right side
    2,175.17x = 3,875,377.06
  5. Step 5: Solve for x
    x = 3,875,377.06/2,175.17
  6. Step 6: Final answer
    x = 1,781.65

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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.