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Finding the Fourth Proportional to 578.97, 798.99 and 316.99

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Solution

The fourth proportional to 578.97, 798.99 and 316.99 is: 437.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    578.97 : 798.99 = 316.99 : x
  2. Step 2: Convert to fraction form
    578.97/798.99 = 316.99/x
  3. Step 3: Cross multiply
    578.97x = 798.99 × 316.99
  4. Step 4: Simplify right side
    578.97x = 253,271.65
  5. Step 5: Solve for x
    x = 253,271.65/578.97
  6. Step 6: Final answer
    x = 437.45

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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.