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Finding the Fourth Proportional to 556.74, 768.39 and 346.95

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Solution

The fourth proportional to 556.74, 768.39 and 346.95 is: 478.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    556.74 : 768.39 = 346.95 : x
  2. Step 2: Convert to fraction form
    556.74/768.39 = 346.95/x
  3. Step 3: Cross multiply
    556.74x = 768.39 × 346.95
  4. Step 4: Simplify right side
    556.74x = 266,591.61
  5. Step 5: Solve for x
    x = 266,591.61/556.74
  6. Step 6: Final answer
    x = 478.84

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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.