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Finding the Fourth Proportional to 2,225.26, 3,338.48 and 665.20

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Solution

The fourth proportional to 2,225.26, 3,338.48 and 665.20 is: 997.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,225.26 : 3,338.48 = 665.20 : x
  2. Step 2: Convert to fraction form
    2,225.26/3,338.48 = 665.20/x
  3. Step 3: Cross multiply
    2,225.26x = 3,338.48 × 665.20
  4. Step 4: Simplify right side
    2,225.26x = 2,220,756.90
  5. Step 5: Solve for x
    x = 2,220,756.90/2,225.26
  6. Step 6: Final answer
    x = 997.98

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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.