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Finding the Fourth Proportional to 543.33, 815.04 and 218.70

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Solution

The fourth proportional to 543.33, 815.04 and 218.70 is: 328.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.33 : 815.04 = 218.70 : x
  2. Step 2: Convert to fraction form
    543.33/815.04 = 218.70/x
  3. Step 3: Cross multiply
    543.33x = 815.04 × 218.70
  4. Step 4: Simplify right side
    543.33x = 178,248.43
  5. Step 5: Solve for x
    x = 178,248.43/543.33
  6. Step 6: Final answer
    x = 328.07

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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.