Home / 2,271.51-3,135.38-1,387.71

Finding the Fourth Proportional to 2,271.51, 3,135.38 and 1,387.71

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Solution

The fourth proportional to 2,271.51, 3,135.38 and 1,387.71 is: 1,915.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,271.51 : 3,135.38 = 1,387.71 : x
  2. Step 2: Convert to fraction form
    2,271.51/3,135.38 = 1,387.71/x
  3. Step 3: Cross multiply
    2,271.51x = 3,135.38 × 1,387.71
  4. Step 4: Simplify right side
    2,271.51x = 4,350,991.24
  5. Step 5: Solve for x
    x = 4,350,991.24/2,271.51
  6. Step 6: Final answer
    x = 1,915.46

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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.