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Finding the Fourth Proportional to 3,963.70, 5,468.19 and 2,390.89

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Solution

The fourth proportional to 3,963.70, 5,468.19 and 2,390.89 is: 3,298.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,963.70 : 5,468.19 = 2,390.89 : x
  2. Step 2: Convert to fraction form
    3,963.70/5,468.19 = 2,390.89/x
  3. Step 3: Cross multiply
    3,963.70x = 5,468.19 × 2,390.89
  4. Step 4: Simplify right side
    3,963.70x = 13,073,840.79
  5. Step 5: Solve for x
    x = 13,073,840.79/3,963.70
  6. Step 6: Final answer
    x = 3,298.39

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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.