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Finding the Fourth Proportional to 1,079.46, 1,619.42 and 376.70

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Solution

The fourth proportional to 1,079.46, 1,619.42 and 376.70 is: 565.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.46 : 1,619.42 = 376.70 : x
  2. Step 2: Convert to fraction form
    1,079.46/1,619.42 = 376.70/x
  3. Step 3: Cross multiply
    1,079.46x = 1,619.42 × 376.70
  4. Step 4: Simplify right side
    1,079.46x = 610,025.53
  5. Step 5: Solve for x
    x = 610,025.53/1,079.46
  6. Step 6: Final answer
    x = 565.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.