Home / 2,205.61-3,291.66-2,116.31

Finding the Fourth Proportional to 2,205.61, 3,291.66 and 2,116.31

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Solution

The fourth proportional to 2,205.61, 3,291.66 and 2,116.31 is: 3,158.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,205.61 : 3,291.66 = 2,116.31 : x
  2. Step 2: Convert to fraction form
    2,205.61/3,291.66 = 2,116.31/x
  3. Step 3: Cross multiply
    2,205.61x = 3,291.66 × 2,116.31
  4. Step 4: Simplify right side
    2,205.61x = 6,966,156.52
  5. Step 5: Solve for x
    x = 6,966,156.52/2,205.61
  6. Step 6: Final answer
    x = 3,158.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.