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Finding the Fourth Proportional to 2,918.11, 4,376.22 and 969.79

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Solution

The fourth proportional to 2,918.11, 4,376.22 and 969.79 is: 1,454.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.11 : 4,376.22 = 969.79 : x
  2. Step 2: Convert to fraction form
    2,918.11/4,376.22 = 969.79/x
  3. Step 3: Cross multiply
    2,918.11x = 4,376.22 × 969.79
  4. Step 4: Simplify right side
    2,918.11x = 4,244,014.39
  5. Step 5: Solve for x
    x = 4,244,014.39/2,918.11
  6. Step 6: Final answer
    x = 1,454.37

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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.