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Finding the Fourth Proportional to 579.78, 872.80 and 529.56

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Solution

The fourth proportional to 579.78, 872.80 and 529.56 is: 797.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.78 : 872.80 = 529.56 : x
  2. Step 2: Convert to fraction form
    579.78/872.80 = 529.56/x
  3. Step 3: Cross multiply
    579.78x = 872.80 × 529.56
  4. Step 4: Simplify right side
    579.78x = 462,199.97
  5. Step 5: Solve for x
    x = 462,199.97/579.78
  6. Step 6: Final answer
    x = 797.20

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.