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Finding the Fourth Proportional to 1,480.45, 2,220.64 and 543.43

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Solution

The fourth proportional to 1,480.45, 2,220.64 and 543.43 is: 815.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,480.45 : 2,220.64 = 543.43 : x
  2. Step 2: Convert to fraction form
    1,480.45/2,220.64 = 543.43/x
  3. Step 3: Cross multiply
    1,480.45x = 2,220.64 × 543.43
  4. Step 4: Simplify right side
    1,480.45x = 1,206,748.57
  5. Step 5: Solve for x
    x = 1,206,748.57/1,480.45
  6. Step 6: Final answer
    x = 815.12

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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.