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Finding the Fourth Proportional to 577.78, 797.04 and 391.02

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Solution

The fourth proportional to 577.78, 797.04 and 391.02 is: 539.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.78 : 797.04 = 391.02 : x
  2. Step 2: Convert to fraction form
    577.78/797.04 = 391.02/x
  3. Step 3: Cross multiply
    577.78x = 797.04 × 391.02
  4. Step 4: Simplify right side
    577.78x = 311,658.58
  5. Step 5: Solve for x
    x = 311,658.58/577.78
  6. Step 6: Final answer
    x = 539.41

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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.