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Finding the Fourth Proportional to 4,839.78, 7,260.76 and 2,647.38

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Solution

The fourth proportional to 4,839.78, 7,260.76 and 2,647.38 is: 3,971.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,839.78 : 7,260.76 = 2,647.38 : x
  2. Step 2: Convert to fraction form
    4,839.78/7,260.76 = 2,647.38/x
  3. Step 3: Cross multiply
    4,839.78x = 7,260.76 × 2,647.38
  4. Step 4: Simplify right side
    4,839.78x = 19,221,990.81
  5. Step 5: Solve for x
    x = 19,221,990.81/4,839.78
  6. Step 6: Final answer
    x = 3,971.67

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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.