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Finding the Fourth Proportional to 3,386.61, 5,082.35 and 1,928.61

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Solution

The fourth proportional to 3,386.61, 5,082.35 and 1,928.61 is: 2,894.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,386.61 : 5,082.35 = 1,928.61 : x
  2. Step 2: Convert to fraction form
    3,386.61/5,082.35 = 1,928.61/x
  3. Step 3: Cross multiply
    3,386.61x = 5,082.35 × 1,928.61
  4. Step 4: Simplify right side
    3,386.61x = 9,801,861.39
  5. Step 5: Solve for x
    x = 9,801,861.39/3,386.61
  6. Step 6: Final answer
    x = 2,894.30

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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.