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Finding the Fourth Proportional to 2,939.81, 4,407.63 and 2,663.01

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Solution

The fourth proportional to 2,939.81, 4,407.63 and 2,663.01 is: 3,992.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.81 : 4,407.63 = 2,663.01 : x
  2. Step 2: Convert to fraction form
    2,939.81/4,407.63 = 2,663.01/x
  3. Step 3: Cross multiply
    2,939.81x = 4,407.63 × 2,663.01
  4. Step 4: Simplify right side
    2,939.81x = 11,737,573.79
  5. Step 5: Solve for x
    x = 11,737,573.79/2,939.81
  6. Step 6: Final answer
    x = 3,992.63

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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.