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Finding the Fourth Proportional to 544.78, 751.82 and 311.91

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Solution

The fourth proportional to 544.78, 751.82 and 311.91 is: 430.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    544.78 : 751.82 = 311.91 : x
  2. Step 2: Convert to fraction form
    544.78/751.82 = 311.91/x
  3. Step 3: Cross multiply
    544.78x = 751.82 × 311.91
  4. Step 4: Simplify right side
    544.78x = 234,495.80
  5. Step 5: Solve for x
    x = 234,495.80/544.78
  6. Step 6: Final answer
    x = 430.44

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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.