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Finding the Fourth Proportional to 564.02, 845.40 and 320.75

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Solution

The fourth proportional to 564.02, 845.40 and 320.75 is: 480.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.02 : 845.40 = 320.75 : x
  2. Step 2: Convert to fraction form
    564.02/845.40 = 320.75/x
  3. Step 3: Cross multiply
    564.02x = 845.40 × 320.75
  4. Step 4: Simplify right side
    564.02x = 271,162.05
  5. Step 5: Solve for x
    x = 271,162.05/564.02
  6. Step 6: Final answer
    x = 480.77

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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.