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Finding the Fourth Proportional to 1,521.38, 2,099.48 and 858.22

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Solution

The fourth proportional to 1,521.38, 2,099.48 and 858.22 is: 1,184.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.38 : 2,099.48 = 858.22 : x
  2. Step 2: Convert to fraction form
    1,521.38/2,099.48 = 858.22/x
  3. Step 3: Cross multiply
    1,521.38x = 2,099.48 × 858.22
  4. Step 4: Simplify right side
    1,521.38x = 1,801,815.73
  5. Step 5: Solve for x
    x = 1,801,815.73/1,521.38
  6. Step 6: Final answer
    x = 1,184.33

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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.