Home / 2,155.91-2,975.70-1,272.29

Finding the Fourth Proportional to 2,155.91, 2,975.70 and 1,272.29

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Solution

The fourth proportional to 2,155.91, 2,975.70 and 1,272.29 is: 1,756.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.91 : 2,975.70 = 1,272.29 : x
  2. Step 2: Convert to fraction form
    2,155.91/2,975.70 = 1,272.29/x
  3. Step 3: Cross multiply
    2,155.91x = 2,975.70 × 1,272.29
  4. Step 4: Simplify right side
    2,155.91x = 3,785,938.47
  5. Step 5: Solve for x
    x = 3,785,938.47/2,155.91
  6. Step 6: Final answer
    x = 1,756.08

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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.