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Finding the Fourth Proportional to 3,951.42, 5,928.71 and 1,486.91

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Solution

The fourth proportional to 3,951.42, 5,928.71 and 1,486.91 is: 2,230.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,951.42 : 5,928.71 = 1,486.91 : x
  2. Step 2: Convert to fraction form
    3,951.42/5,928.71 = 1,486.91/x
  3. Step 3: Cross multiply
    3,951.42x = 5,928.71 × 1,486.91
  4. Step 4: Simplify right side
    3,951.42x = 8,815,421.11
  5. Step 5: Solve for x
    x = 8,815,421.11/3,951.42
  6. Step 6: Final answer
    x = 2,230.95

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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.