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Finding the Fourth Proportional to 150.21, 206.85 and 147.15

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Solution

The fourth proportional to 150.21, 206.85 and 147.15 is: 202.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    150.21 : 206.85 = 147.15 : x
  2. Step 2: Convert to fraction form
    150.21/206.85 = 147.15/x
  3. Step 3: Cross multiply
    150.21x = 206.85 × 147.15
  4. Step 4: Simplify right side
    150.21x = 30,437.98
  5. Step 5: Solve for x
    x = 30,437.98/150.21
  6. Step 6: Final answer
    x = 202.64

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.