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Finding the Fourth Proportional to 578.69, 798.56 and 316.70

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Solution

The fourth proportional to 578.69, 798.56 and 316.70 is: 437.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.69 : 798.56 = 316.70 : x
  2. Step 2: Convert to fraction form
    578.69/798.56 = 316.70/x
  3. Step 3: Cross multiply
    578.69x = 798.56 × 316.70
  4. Step 4: Simplify right side
    578.69x = 252,898.38
  5. Step 5: Solve for x
    x = 252,898.38/578.69
  6. Step 6: Final answer
    x = 437.02

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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.