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Finding the Fourth Proportional to 2,059.86, 3,091.95 and 761.70

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Solution

The fourth proportional to 2,059.86, 3,091.95 and 761.70 is: 1,143.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,059.86 : 3,091.95 = 761.70 : x
  2. Step 2: Convert to fraction form
    2,059.86/3,091.95 = 761.70/x
  3. Step 3: Cross multiply
    2,059.86x = 3,091.95 × 761.70
  4. Step 4: Simplify right side
    2,059.86x = 2,355,138.32
  5. Step 5: Solve for x
    x = 2,355,138.32/2,059.86
  6. Step 6: Final answer
    x = 1,143.35

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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.