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Finding the Fourth Proportional to 3,391.72, 4,666.89 and 3,305.86

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Solution

The fourth proportional to 3,391.72, 4,666.89 and 3,305.86 is: 4,548.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,391.72 : 4,666.89 = 3,305.86 : x
  2. Step 2: Convert to fraction form
    3,391.72/4,666.89 = 3,305.86/x
  3. Step 3: Cross multiply
    3,391.72x = 4,666.89 × 3,305.86
  4. Step 4: Simplify right side
    3,391.72x = 15,428,084.98
  5. Step 5: Solve for x
    x = 15,428,084.98/3,391.72
  6. Step 6: Final answer
    x = 4,548.75

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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.