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Finding the Fourth Proportional to 4,913.31, 7,369.97 and 1,991.67

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Solution

The fourth proportional to 4,913.31, 7,369.97 and 1,991.67 is: 2,987.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,913.31 : 7,369.97 = 1,991.67 : x
  2. Step 2: Convert to fraction form
    4,913.31/7,369.97 = 1,991.67/x
  3. Step 3: Cross multiply
    4,913.31x = 7,369.97 × 1,991.67
  4. Step 4: Simplify right side
    4,913.31x = 14,678,538.19
  5. Step 5: Solve for x
    x = 14,678,538.19/4,913.31
  6. Step 6: Final answer
    x = 2,987.51

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Similar ratio
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1.5x scale

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.