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Finding the Fourth Proportional to 544.55, 751.39 and 311.63

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Solution

The fourth proportional to 544.55, 751.39 and 311.63 is: 429.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    544.55 : 751.39 = 311.63 : x
  2. Step 2: Convert to fraction form
    544.55/751.39 = 311.63/x
  3. Step 3: Cross multiply
    544.55x = 751.39 × 311.63
  4. Step 4: Simplify right side
    544.55x = 234,151.13
  5. Step 5: Solve for x
    x = 234,151.13/544.55
  6. Step 6: Final answer
    x = 429.99

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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.