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Finding the Fourth Proportional to 529.64, 792.38 and 393

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Solution

The fourth proportional to 529.64, 792.38 and 393 is: 587.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    529.64 : 792.38 = 393 : x
  2. Step 2: Convert to fraction form
    529.64/792.38 = 393/x
  3. Step 3: Cross multiply
    529.64x = 792.38 × 393
  4. Step 4: Simplify right side
    529.64x = 311,405.34
  5. Step 5: Solve for x
    x = 311,405.34/529.64
  6. Step 6: Final answer
    x = 587.96

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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.