Home / 2,620.27-3,611.78-1,988.74

Finding the Fourth Proportional to 2,620.27, 3,611.78 and 1,988.74

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Solution

The fourth proportional to 2,620.27, 3,611.78 and 1,988.74 is: 2,741.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,620.27 : 3,611.78 = 1,988.74 : x
  2. Step 2: Convert to fraction form
    2,620.27/3,611.78 = 1,988.74/x
  3. Step 3: Cross multiply
    2,620.27x = 3,611.78 × 1,988.74
  4. Step 4: Simplify right side
    2,620.27x = 7,182,881.41
  5. Step 5: Solve for x
    x = 7,182,881.41/2,620.27
  6. Step 6: Final answer
    x = 2,741.28

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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.