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Finding the Fourth Proportional to 572.38, 793.21 and 561.44

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Solution

The fourth proportional to 572.38, 793.21 and 561.44 is: 778.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    572.38 : 793.21 = 561.44 : x
  2. Step 2: Convert to fraction form
    572.38/793.21 = 561.44/x
  3. Step 3: Cross multiply
    572.38x = 793.21 × 561.44
  4. Step 4: Simplify right side
    572.38x = 445,339.82
  5. Step 5: Solve for x
    x = 445,339.82/572.38
  6. Step 6: Final answer
    x = 778.05

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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.