Home / 2,657.20-3,988.32-1,271.29

Finding the Fourth Proportional to 2,657.20, 3,988.32 and 1,271.29

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Solution

The fourth proportional to 2,657.20, 3,988.32 and 1,271.29 is: 1,908.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,657.20 : 3,988.32 = 1,271.29 : x
  2. Step 2: Convert to fraction form
    2,657.20/3,988.32 = 1,271.29/x
  3. Step 3: Cross multiply
    2,657.20x = 3,988.32 × 1,271.29
  4. Step 4: Simplify right side
    2,657.20x = 5,070,291.39
  5. Step 5: Solve for x
    x = 5,070,291.39/2,657.20
  6. Step 6: Final answer
    x = 1,908.14

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.