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Finding the Fourth Proportional to 318.03, 477.09 and 101.64

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Solution

The fourth proportional to 318.03, 477.09 and 101.64 is: 152.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    318.03 : 477.09 = 101.64 : x
  2. Step 2: Convert to fraction form
    318.03/477.09 = 101.64/x
  3. Step 3: Cross multiply
    318.03x = 477.09 × 101.64
  4. Step 4: Simplify right side
    318.03x = 48,491.43
  5. Step 5: Solve for x
    x = 48,491.43/318.03
  6. Step 6: Final answer
    x = 152.47

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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.