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Finding the Fourth Proportional to 578.86, 798.84 and 316.88

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Solution

The fourth proportional to 578.86, 798.84 and 316.88 is: 437.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.86 : 798.84 = 316.88 : x
  2. Step 2: Convert to fraction form
    578.86/798.84 = 316.88/x
  3. Step 3: Cross multiply
    578.86x = 798.84 × 316.88
  4. Step 4: Simplify right side
    578.86x = 253,136.42
  5. Step 5: Solve for x
    x = 253,136.42/578.86
  6. Step 6: Final answer
    x = 437.30

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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.