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Finding the Fourth Proportional to 1,378.44, 1,900.08 and 1,045.52

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Solution

The fourth proportional to 1,378.44, 1,900.08 and 1,045.52 is: 1,441.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,378.44 : 1,900.08 = 1,045.52 : x
  2. Step 2: Convert to fraction form
    1,378.44/1,900.08 = 1,045.52/x
  3. Step 3: Cross multiply
    1,378.44x = 1,900.08 × 1,045.52
  4. Step 4: Simplify right side
    1,378.44x = 1,986,571.64
  5. Step 5: Solve for x
    x = 1,986,571.64/1,378.44
  6. Step 6: Final answer
    x = 1,441.17

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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.