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Finding the Fourth Proportional to 2,225.40, 3,338.82 and 665.42

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Solution

The fourth proportional to 2,225.40, 3,338.82 and 665.42 is: 998.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,225.40 : 3,338.82 = 665.42 : x
  2. Step 2: Convert to fraction form
    2,225.40/3,338.82 = 665.42/x
  3. Step 3: Cross multiply
    2,225.40x = 3,338.82 × 665.42
  4. Step 4: Simplify right side
    2,225.40x = 2,221,717.60
  5. Step 5: Solve for x
    x = 2,221,717.60/2,225.40
  6. Step 6: Final answer
    x = 998.35

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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.