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Finding the Fourth Proportional to 1,344.45, 1,855.19 and 755.05

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Solution

The fourth proportional to 1,344.45, 1,855.19 and 755.05 is: 1,041.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,344.45 : 1,855.19 = 755.05 : x
  2. Step 2: Convert to fraction form
    1,344.45/1,855.19 = 755.05/x
  3. Step 3: Cross multiply
    1,344.45x = 1,855.19 × 755.05
  4. Step 4: Simplify right side
    1,344.45x = 1,400,761.21
  5. Step 5: Solve for x
    x = 1,400,761.21/1,344.45
  6. Step 6: Final answer
    x = 1,041.88

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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.