Home / 2,217.78-3,061.67-1,557.23

Finding the Fourth Proportional to 2,217.78, 3,061.67 and 1,557.23

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Solution

The fourth proportional to 2,217.78, 3,061.67 and 1,557.23 is: 2,149.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,217.78 : 3,061.67 = 1,557.23 : x
  2. Step 2: Convert to fraction form
    2,217.78/3,061.67 = 1,557.23/x
  3. Step 3: Cross multiply
    2,217.78x = 3,061.67 × 1,557.23
  4. Step 4: Simplify right side
    2,217.78x = 4,767,701.28
  5. Step 5: Solve for x
    x = 4,767,701.28/2,217.78
  6. Step 6: Final answer
    x = 2,149.76

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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.