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Finding the Fourth Proportional to 5,285.91, 7,294.61 and 2,928.11

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Solution

The fourth proportional to 5,285.91, 7,294.61 and 2,928.11 is: 4,040.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,285.91 : 7,294.61 = 2,928.11 : x
  2. Step 2: Convert to fraction form
    5,285.91/7,294.61 = 2,928.11/x
  3. Step 3: Cross multiply
    5,285.91x = 7,294.61 × 2,928.11
  4. Step 4: Simplify right side
    5,285.91x = 21,359,369.37
  5. Step 5: Solve for x
    x = 21,359,369.37/5,285.91
  6. Step 6: Final answer
    x = 4,040.81

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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.