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Finding the Fourth Proportional to 578.71, 798.62 and 316.75

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Solution

The fourth proportional to 578.71, 798.62 and 316.75 is: 437.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.71 : 798.62 = 316.75 : x
  2. Step 2: Convert to fraction form
    578.71/798.62 = 316.75/x
  3. Step 3: Cross multiply
    578.71x = 798.62 × 316.75
  4. Step 4: Simplify right side
    578.71x = 252,960.49
  5. Step 5: Solve for x
    x = 252,960.49/578.71
  6. Step 6: Final answer
    x = 437.11

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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.