Home / 2,177.79-3,005.00-1,281.57

Finding the Fourth Proportional to 2,177.79, 3,005.00 and 1,281.57

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Solution

The fourth proportional to 2,177.79, 3,005.00 and 1,281.57 is: 1,768.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,177.79 : 3,005.00 = 1,281.57 : x
  2. Step 2: Convert to fraction form
    2,177.79/3,005.00 = 1,281.57/x
  3. Step 3: Cross multiply
    2,177.79x = 3,005.00 × 1,281.57
  4. Step 4: Simplify right side
    2,177.79x = 3,851,121.88
  5. Step 5: Solve for x
    x = 3,851,121.88/2,177.79
  6. Step 6: Final answer
    x = 1,768.37

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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.