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Finding the Fourth Proportional to 5,245.65, 7,239.07 and 2,855.70

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Solution

The fourth proportional to 5,245.65, 7,239.07 and 2,855.70 is: 3,940.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,245.65 : 7,239.07 = 2,855.70 : x
  2. Step 2: Convert to fraction form
    5,245.65/7,239.07 = 2,855.70/x
  3. Step 3: Cross multiply
    5,245.65x = 7,239.07 × 2,855.70
  4. Step 4: Simplify right side
    5,245.65x = 20,672,612.20
  5. Step 5: Solve for x
    x = 20,672,612.20/5,245.65
  6. Step 6: Final answer
    x = 3,940.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.