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Finding the Fourth Proportional to 528.86, 792.21 and 322.79

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Solution

The fourth proportional to 528.86, 792.21 and 322.79 is: 483.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.86 : 792.21 = 322.79 : x
  2. Step 2: Convert to fraction form
    528.86/792.21 = 322.79/x
  3. Step 3: Cross multiply
    528.86x = 792.21 × 322.79
  4. Step 4: Simplify right side
    528.86x = 255,714.72
  5. Step 5: Solve for x
    x = 255,714.72/528.86
  6. Step 6: Final answer
    x = 483.52

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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.