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Finding the Fourth Proportional to 553.52, 830.68 and 519.52

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Solution

The fourth proportional to 553.52, 830.68 and 519.52 is: 779.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    553.52 : 830.68 = 519.52 : x
  2. Step 2: Convert to fraction form
    553.52/830.68 = 519.52/x
  3. Step 3: Cross multiply
    553.52x = 830.68 × 519.52
  4. Step 4: Simplify right side
    553.52x = 431,554.87
  5. Step 5: Solve for x
    x = 431,554.87/553.52
  6. Step 6: Final answer
    x = 779.66

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.