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Finding the Fourth Proportional to 528.99, 792.16 and 320.64

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Solution

The fourth proportional to 528.99, 792.16 and 320.64 is: 480.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    528.99 : 792.16 = 320.64 : x
  2. Step 2: Convert to fraction form
    528.99/792.16 = 320.64/x
  3. Step 3: Cross multiply
    528.99x = 792.16 × 320.64
  4. Step 4: Simplify right side
    528.99x = 253,998.18
  5. Step 5: Solve for x
    x = 253,998.18/528.99
  6. Step 6: Final answer
    x = 480.16

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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.