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Finding the Fourth Proportional to 1,555.44, 2,147.51 and 996.13

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Solution

The fourth proportional to 1,555.44, 2,147.51 and 996.13 is: 1,375.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.44 : 2,147.51 = 996.13 : x
  2. Step 2: Convert to fraction form
    1,555.44/2,147.51 = 996.13/x
  3. Step 3: Cross multiply
    1,555.44x = 2,147.51 × 996.13
  4. Step 4: Simplify right side
    1,555.44x = 2,139,204.31
  5. Step 5: Solve for x
    x = 2,139,204.31/1,555.44
  6. Step 6: Final answer
    x = 1,375.31

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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.