Home / 2,175.76-3,001.19-1,290.94

Finding the Fourth Proportional to 2,175.76, 3,001.19 and 1,290.94

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Solution

The fourth proportional to 2,175.76, 3,001.19 and 1,290.94 is: 1,780.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,175.76 : 3,001.19 = 1,290.94 : x
  2. Step 2: Convert to fraction form
    2,175.76/3,001.19 = 1,290.94/x
  3. Step 3: Cross multiply
    2,175.76x = 3,001.19 × 1,290.94
  4. Step 4: Simplify right side
    2,175.76x = 3,874,342.26
  5. Step 5: Solve for x
    x = 3,874,342.26/2,175.76
  6. Step 6: Final answer
    x = 1,780.68

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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.