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Finding the Fourth Proportional to 1,350.30, 1,865.43 and 1,069.65

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Solution

The fourth proportional to 1,350.30, 1,865.43 and 1,069.65 is: 1,477.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,350.30 : 1,865.43 = 1,069.65 : x
  2. Step 2: Convert to fraction form
    1,350.30/1,865.43 = 1,069.65/x
  3. Step 3: Cross multiply
    1,350.30x = 1,865.43 × 1,069.65
  4. Step 4: Simplify right side
    1,350.30x = 1,995,357.20
  5. Step 5: Solve for x
    x = 1,995,357.20/1,350.30
  6. Step 6: Final answer
    x = 1,477.71

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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.