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Finding the Fourth Proportional to 579.95, 869.48 and 394.37

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Solution

The fourth proportional to 579.95, 869.48 and 394.37 is: 591.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.95 : 869.48 = 394.37 : x
  2. Step 2: Convert to fraction form
    579.95/869.48 = 394.37/x
  3. Step 3: Cross multiply
    579.95x = 869.48 × 394.37
  4. Step 4: Simplify right side
    579.95x = 342,902.36
  5. Step 5: Solve for x
    x = 342,902.36/579.95
  6. Step 6: Final answer
    x = 591.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.