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Finding the Fourth Proportional to 529.66, 792.94 and 393.31

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Solution

The fourth proportional to 529.66, 792.94 and 393.31 is: 588.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.66 : 792.94 = 393.31 : x
  2. Step 2: Convert to fraction form
    529.66/792.94 = 393.31/x
  3. Step 3: Cross multiply
    529.66x = 792.94 × 393.31
  4. Step 4: Simplify right side
    529.66x = 311,867.52
  5. Step 5: Solve for x
    x = 311,867.52/529.66
  6. Step 6: Final answer
    x = 588.81

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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.