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Finding the Fourth Proportional to 564.64, 846.78 and 318.22

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Solution

The fourth proportional to 564.64, 846.78 and 318.22 is: 477.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    564.64 : 846.78 = 318.22 : x
  2. Step 2: Convert to fraction form
    564.64/846.78 = 318.22/x
  3. Step 3: Cross multiply
    564.64x = 846.78 × 318.22
  4. Step 4: Simplify right side
    564.64x = 269,462.33
  5. Step 5: Solve for x
    x = 269,462.33/564.64
  6. Step 6: Final answer
    x = 477.23

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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.