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Finding the Fourth Proportional to 529.91, 793.31 and 393.56

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Solution

The fourth proportional to 529.91, 793.31 and 393.56 is: 589.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.91 : 793.31 = 393.56 : x
  2. Step 2: Convert to fraction form
    529.91/793.31 = 393.56/x
  3. Step 3: Cross multiply
    529.91x = 793.31 × 393.56
  4. Step 4: Simplify right side
    529.91x = 312,212.10
  5. Step 5: Solve for x
    x = 312,212.10/529.91
  6. Step 6: Final answer
    x = 589.19

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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.