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Finding the Fourth Proportional to 3,578.82, 5,367.66 and 981.16

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Solution

The fourth proportional to 3,578.82, 5,367.66 and 981.16 is: 1,471.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,578.82 : 5,367.66 = 981.16 : x
  2. Step 2: Convert to fraction form
    3,578.82/5,367.66 = 981.16/x
  3. Step 3: Cross multiply
    3,578.82x = 5,367.66 × 981.16
  4. Step 4: Simplify right side
    3,578.82x = 5,266,533.29
  5. Step 5: Solve for x
    x = 5,266,533.29/3,578.82
  6. Step 6: Final answer
    x = 1,471.58

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1.5x scale

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.