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Finding the Fourth Proportional to 3,905.93, 5,390.55 and 2,333.99

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Solution

The fourth proportional to 3,905.93, 5,390.55 and 2,333.99 is: 3,221.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,905.93 : 5,390.55 = 2,333.99 : x
  2. Step 2: Convert to fraction form
    3,905.93/5,390.55 = 2,333.99/x
  3. Step 3: Cross multiply
    3,905.93x = 5,390.55 × 2,333.99
  4. Step 4: Simplify right side
    3,905.93x = 12,581,489.79
  5. Step 5: Solve for x
    x = 12,581,489.79/3,905.93
  6. Step 6: Final answer
    x = 3,221.13

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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.