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Finding the Fourth Proportional to 5,286.11, 7,294.55 and 2,928.11

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Solution

The fourth proportional to 5,286.11, 7,294.55 and 2,928.11 is: 4,040.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,286.11 : 7,294.55 = 2,928.11 : x
  2. Step 2: Convert to fraction form
    5,286.11/7,294.55 = 2,928.11/x
  3. Step 3: Cross multiply
    5,286.11x = 7,294.55 × 2,928.11
  4. Step 4: Simplify right side
    5,286.11x = 21,359,193.69
  5. Step 5: Solve for x
    x = 21,359,193.69/5,286.11
  6. Step 6: Final answer
    x = 4,040.63

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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.