Home / 1,330.43-1,991.55-1,217.03

Finding the Fourth Proportional to 1,330.43, 1,991.55 and 1,217.03

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Solution

The fourth proportional to 1,330.43, 1,991.55 and 1,217.03 is: 1,821.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.43 : 1,991.55 = 1,217.03 : x
  2. Step 2: Convert to fraction form
    1,330.43/1,991.55 = 1,217.03/x
  3. Step 3: Cross multiply
    1,330.43x = 1,991.55 × 1,217.03
  4. Step 4: Simplify right side
    1,330.43x = 2,423,776.10
  5. Step 5: Solve for x
    x = 2,423,776.10/1,330.43
  6. Step 6: Final answer
    x = 1,821.80

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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.