Home / 1,521.45-2,286.35-905.30

Finding the Fourth Proportional to 1,521.45, 2,286.35 and 905.30

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Solution

The fourth proportional to 1,521.45, 2,286.35 and 905.30 is: 1,360.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,521.45 : 2,286.35 = 905.30 : x
  2. Step 2: Convert to fraction form
    1,521.45/2,286.35 = 905.30/x
  3. Step 3: Cross multiply
    1,521.45x = 2,286.35 × 905.30
  4. Step 4: Simplify right side
    1,521.45x = 2,069,816.70
  5. Step 5: Solve for x
    x = 2,069,816.70/1,521.45
  6. Step 6: Final answer
    x = 1,360.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.