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Finding the Fourth Proportional to 1,105.80, 1,525.43 and 896.21

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Solution

The fourth proportional to 1,105.80, 1,525.43 and 896.21 is: 1,236.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,105.80 : 1,525.43 = 896.21 : x
  2. Step 2: Convert to fraction form
    1,105.80/1,525.43 = 896.21/x
  3. Step 3: Cross multiply
    1,105.80x = 1,525.43 × 896.21
  4. Step 4: Simplify right side
    1,105.80x = 1,367,114.53
  5. Step 5: Solve for x
    x = 1,367,114.53/1,105.80
  6. Step 6: Final answer
    x = 1,236.31

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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.