Home / 2,277.80-3,136.74-1,978.91

Finding the Fourth Proportional to 2,277.80, 3,136.74 and 1,978.91

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Solution

The fourth proportional to 2,277.80, 3,136.74 and 1,978.91 is: 2,725.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,277.80 : 3,136.74 = 1,978.91 : x
  2. Step 2: Convert to fraction form
    2,277.80/3,136.74 = 1,978.91/x
  3. Step 3: Cross multiply
    2,277.80x = 3,136.74 × 1,978.91
  4. Step 4: Simplify right side
    2,277.80x = 6,207,310.47
  5. Step 5: Solve for x
    x = 6,207,310.47/2,277.80
  6. Step 6: Final answer
    x = 2,725.14

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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.