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Finding the Fourth Proportional to 554.99, 766.17 and 378.88

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Solution

The fourth proportional to 554.99, 766.17 and 378.88 is: 523.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.99 : 766.17 = 378.88 : x
  2. Step 2: Convert to fraction form
    554.99/766.17 = 378.88/x
  3. Step 3: Cross multiply
    554.99x = 766.17 × 378.88
  4. Step 4: Simplify right side
    554.99x = 290,284.57
  5. Step 5: Solve for x
    x = 290,284.57/554.99
  6. Step 6: Final answer
    x = 523.05

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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.