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Finding the Fourth Proportional to 318.21, 475.56 and 293.58

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Solution

The fourth proportional to 318.21, 475.56 and 293.58 is: 438.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.21 : 475.56 = 293.58 : x
  2. Step 2: Convert to fraction form
    318.21/475.56 = 293.58/x
  3. Step 3: Cross multiply
    318.21x = 475.56 × 293.58
  4. Step 4: Simplify right side
    318.21x = 139,614.90
  5. Step 5: Solve for x
    x = 139,614.90/318.21
  6. Step 6: Final answer
    x = 438.75

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.