Home / 1,521.10-2,099.10-857.95

Finding the Fourth Proportional to 1,521.10, 2,099.10 and 857.95

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Solution

The fourth proportional to 1,521.10, 2,099.10 and 857.95 is: 1,183.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.10 : 2,099.10 = 857.95 : x
  2. Step 2: Convert to fraction form
    1,521.10/2,099.10 = 857.95/x
  3. Step 3: Cross multiply
    1,521.10x = 2,099.10 × 857.95
  4. Step 4: Simplify right side
    1,521.10x = 1,800,922.85
  5. Step 5: Solve for x
    x = 1,800,922.85/1,521.10
  6. Step 6: Final answer
    x = 1,183.96

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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.