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Finding the Fourth Proportional to 544.76, 751.78 and 311.90

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Solution

The fourth proportional to 544.76, 751.78 and 311.90 is: 430.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    544.76 : 751.78 = 311.90 : x
  2. Step 2: Convert to fraction form
    544.76/751.78 = 311.90/x
  3. Step 3: Cross multiply
    544.76x = 751.78 × 311.90
  4. Step 4: Simplify right side
    544.76x = 234,480.18
  5. Step 5: Solve for x
    x = 234,480.18/544.76
  6. Step 6: Final answer
    x = 430.43

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Find fourth proportional to 272.38, 375.89 and 155.95
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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.