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Finding the Fourth Proportional to 577.61, 796.16 and 391.04

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Solution

The fourth proportional to 577.61, 796.16 and 391.04 is: 538.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.61 : 796.16 = 391.04 : x
  2. Step 2: Convert to fraction form
    577.61/796.16 = 391.04/x
  3. Step 3: Cross multiply
    577.61x = 796.16 × 391.04
  4. Step 4: Simplify right side
    577.61x = 311,324.47
  5. Step 5: Solve for x
    x = 311,324.47/577.61
  6. Step 6: Final answer
    x = 538.99

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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.