Home / 1,521.17-2,099.22-822.55

Finding the Fourth Proportional to 1,521.17, 2,099.22 and 822.55

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Solution

The fourth proportional to 1,521.17, 2,099.22 and 822.55 is: 1,135.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.17 : 2,099.22 = 822.55 : x
  2. Step 2: Convert to fraction form
    1,521.17/2,099.22 = 822.55/x
  3. Step 3: Cross multiply
    1,521.17x = 2,099.22 × 822.55
  4. Step 4: Simplify right side
    1,521.17x = 1,726,713.41
  5. Step 5: Solve for x
    x = 1,726,713.41/1,521.17
  6. Step 6: Final answer
    x = 1,135.12

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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.