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Finding the Fourth Proportional to 554.05, 763.72 and 379.09

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Solution

The fourth proportional to 554.05, 763.72 and 379.09 is: 522.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.05 : 763.72 = 379.09 : x
  2. Step 2: Convert to fraction form
    554.05/763.72 = 379.09/x
  3. Step 3: Cross multiply
    554.05x = 763.72 × 379.09
  4. Step 4: Simplify right side
    554.05x = 289,518.61
  5. Step 5: Solve for x
    x = 289,518.61/554.05
  6. Step 6: Final answer
    x = 522.55

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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.