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Finding the Fourth Proportional to 559.12, 776.92 and 553.12

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Solution

The fourth proportional to 559.12, 776.92 and 553.12 is: 768.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    559.12 : 776.92 = 553.12 : x
  2. Step 2: Convert to fraction form
    559.12/776.92 = 553.12/x
  3. Step 3: Cross multiply
    559.12x = 776.92 × 553.12
  4. Step 4: Simplify right side
    559.12x = 429,729.99
  5. Step 5: Solve for x
    x = 429,729.99/559.12
  6. Step 6: Final answer
    x = 768.58

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.