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Finding the Fourth Proportional to 3,133.92, 4,678 and 2,905.50

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Solution

The fourth proportional to 3,133.92, 4,678 and 2,905.50 is: 4,337.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,133.92 : 4,678 = 2,905.50 : x
  2. Step 2: Convert to fraction form
    3,133.92/4,678 = 2,905.50/x
  3. Step 3: Cross multiply
    3,133.92x = 4,678 × 2,905.50
  4. Step 4: Simplify right side
    3,133.92x = 13,591,929
  5. Step 5: Solve for x
    x = 13,591,929/3,133.92
  6. Step 6: Final answer
    x = 4,337.04

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.