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Finding the Fourth Proportional to 3,945.92, 5,913.24 and 2,897.70

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Solution

The fourth proportional to 3,945.92, 5,913.24 and 2,897.70 is: 4,342.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.92 : 5,913.24 = 2,897.70 : x
  2. Step 2: Convert to fraction form
    3,945.92/5,913.24 = 2,897.70/x
  3. Step 3: Cross multiply
    3,945.92x = 5,913.24 × 2,897.70
  4. Step 4: Simplify right side
    3,945.92x = 17,134,751.49
  5. Step 5: Solve for x
    x = 17,134,751.49/3,945.92
  6. Step 6: Final answer
    x = 4,342.40

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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.