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Finding the Fourth Proportional to 2,213.48, 3,320.73 and 653.42

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Solution

The fourth proportional to 2,213.48, 3,320.73 and 653.42 is: 980.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,213.48 : 3,320.73 = 653.42 : x
  2. Step 2: Convert to fraction form
    2,213.48/3,320.73 = 653.42/x
  3. Step 3: Cross multiply
    2,213.48x = 3,320.73 × 653.42
  4. Step 4: Simplify right side
    2,213.48x = 2,169,839.70
  5. Step 5: Solve for x
    x = 2,169,839.70/2,213.48
  6. Step 6: Final answer
    x = 980.28

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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.