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Finding the Fourth Proportional to 513.78, 771.60 and 470.94

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Solution

The fourth proportional to 513.78, 771.60 and 470.94 is: 707.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    513.78 : 771.60 = 470.94 : x
  2. Step 2: Convert to fraction form
    513.78/771.60 = 470.94/x
  3. Step 3: Cross multiply
    513.78x = 771.60 × 470.94
  4. Step 4: Simplify right side
    513.78x = 363,377.30
  5. Step 5: Solve for x
    x = 363,377.30/513.78
  6. Step 6: Final answer
    x = 707.26

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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.