Home / 1,777.20-2,453.70-1,217.48

Finding the Fourth Proportional to 1,777.20, 2,453.70 and 1,217.48

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Solution

The fourth proportional to 1,777.20, 2,453.70 and 1,217.48 is: 1,680.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,777.20 : 2,453.70 = 1,217.48 : x
  2. Step 2: Convert to fraction form
    1,777.20/2,453.70 = 1,217.48/x
  3. Step 3: Cross multiply
    1,777.20x = 2,453.70 × 1,217.48
  4. Step 4: Simplify right side
    1,777.20x = 2,987,318.41
  5. Step 5: Solve for x
    x = 2,987,318.41/1,777.20
  6. Step 6: Final answer
    x = 1,680.91

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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.