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Finding the Fourth Proportional to 543.97, 750.68 and 311.11

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Solution

The fourth proportional to 543.97, 750.68 and 311.11 is: 429.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    543.97 : 750.68 = 311.11 : x
  2. Step 2: Convert to fraction form
    543.97/750.68 = 311.11/x
  3. Step 3: Cross multiply
    543.97x = 750.68 × 311.11
  4. Step 4: Simplify right side
    543.97x = 233,541.79
  5. Step 5: Solve for x
    x = 233,541.79/543.97
  6. Step 6: Final answer
    x = 429.33

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.