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Finding the Fourth Proportional to 4,910.76, 7,366.95 and 1,991.07

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Solution

The fourth proportional to 4,910.76, 7,366.95 and 1,991.07 is: 2,986.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,910.76 : 7,366.95 = 1,991.07 : x
  2. Step 2: Convert to fraction form
    4,910.76/7,366.95 = 1,991.07/x
  3. Step 3: Cross multiply
    4,910.76x = 7,366.95 × 1,991.07
  4. Step 4: Simplify right side
    4,910.76x = 14,668,113.14
  5. Step 5: Solve for x
    x = 14,668,113.14/4,910.76
  6. Step 6: Final answer
    x = 2,986.93

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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.