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Finding the Fourth Proportional to 577.20, 795.36 and 479.28

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Solution

The fourth proportional to 577.20, 795.36 and 479.28 is: 660.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    577.20 : 795.36 = 479.28 : x
  2. Step 2: Convert to fraction form
    577.20/795.36 = 479.28/x
  3. Step 3: Cross multiply
    577.20x = 795.36 × 479.28
  4. Step 4: Simplify right side
    577.20x = 381,200.14
  5. Step 5: Solve for x
    x = 381,200.14/577.20
  6. Step 6: Final answer
    x = 660.43

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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.