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Finding the Fourth Proportional to 2,091.66, 3,137.50 and 630.79

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Solution

The fourth proportional to 2,091.66, 3,137.50 and 630.79 is: 946.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.66 : 3,137.50 = 630.79 : x
  2. Step 2: Convert to fraction form
    2,091.66/3,137.50 = 630.79/x
  3. Step 3: Cross multiply
    2,091.66x = 3,137.50 × 630.79
  4. Step 4: Simplify right side
    2,091.66x = 1,979,096.57
  5. Step 5: Solve for x
    x = 1,979,096.57/2,091.66
  6. Step 6: Final answer
    x = 946.19

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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.