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Finding the Fourth Proportional to 565.15, 779.82 and 316.42

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Solution

The fourth proportional to 565.15, 779.82 and 316.42 is: 436.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    565.15 : 779.82 = 316.42 : x
  2. Step 2: Convert to fraction form
    565.15/779.82 = 316.42/x
  3. Step 3: Cross multiply
    565.15x = 779.82 × 316.42
  4. Step 4: Simplify right side
    565.15x = 246,751.62
  5. Step 5: Solve for x
    x = 246,751.62/565.15
  6. Step 6: Final answer
    x = 436.61

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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.