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Finding the Fourth Proportional to 544.32, 751.17 and 311.45

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Solution

The fourth proportional to 544.32, 751.17 and 311.45 is: 429.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    544.32 : 751.17 = 311.45 : x
  2. Step 2: Convert to fraction form
    544.32/751.17 = 311.45/x
  3. Step 3: Cross multiply
    544.32x = 751.17 × 311.45
  4. Step 4: Simplify right side
    544.32x = 233,948.14
  5. Step 5: Solve for x
    x = 233,948.14/544.32
  6. Step 6: Final answer
    x = 429.80

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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.