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Finding the Fourth Proportional to 2,423.84, 3,640.07 and 1,985.92

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Solution

The fourth proportional to 2,423.84, 3,640.07 and 1,985.92 is: 2,982.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,423.84 : 3,640.07 = 1,985.92 : x
  2. Step 2: Convert to fraction form
    2,423.84/3,640.07 = 1,985.92/x
  3. Step 3: Cross multiply
    2,423.84x = 3,640.07 × 1,985.92
  4. Step 4: Simplify right side
    2,423.84x = 7,228,883.68
  5. Step 5: Solve for x
    x = 7,228,883.68/2,423.84
  6. Step 6: Final answer
    x = 2,982.42

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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.