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Finding the Fourth Proportional to 4,807.85, 7,213.80 and 2,618.15

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Solution

The fourth proportional to 4,807.85, 7,213.80 and 2,618.15 is: 3,928.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,807.85 : 7,213.80 = 2,618.15 : x
  2. Step 2: Convert to fraction form
    4,807.85/7,213.80 = 2,618.15/x
  3. Step 3: Cross multiply
    4,807.85x = 7,213.80 × 2,618.15
  4. Step 4: Simplify right side
    4,807.85x = 18,886,810.47
  5. Step 5: Solve for x
    x = 18,886,810.47/4,807.85
  6. Step 6: Final answer
    x = 3,928.33

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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.