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Finding the Fourth Proportional to 576.99, 796.14 and 390.87

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Solution

The fourth proportional to 576.99, 796.14 and 390.87 is: 539.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.99 : 796.14 = 390.87 : x
  2. Step 2: Convert to fraction form
    576.99/796.14 = 390.87/x
  3. Step 3: Cross multiply
    576.99x = 796.14 × 390.87
  4. Step 4: Simplify right side
    576.99x = 311,187.24
  5. Step 5: Solve for x
    x = 311,187.24/576.99
  6. Step 6: Final answer
    x = 539.33

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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.