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Finding the Fourth Proportional to 4,618.72, 6,928.03 and 1,331.79

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Solution

The fourth proportional to 4,618.72, 6,928.03 and 1,331.79 is: 1,997.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,618.72 : 6,928.03 = 1,331.79 : x
  2. Step 2: Convert to fraction form
    4,618.72/6,928.03 = 1,331.79/x
  3. Step 3: Cross multiply
    4,618.72x = 6,928.03 × 1,331.79
  4. Step 4: Simplify right side
    4,618.72x = 9,226,681.07
  5. Step 5: Solve for x
    x = 9,226,681.07/4,618.72
  6. Step 6: Final answer
    x = 1,997.67

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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.