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Finding the Fourth Proportional to 155.72, 216 and 150.18

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Solution

The fourth proportional to 155.72, 216 and 150.18 is: 208.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.72 : 216 = 150.18 : x
  2. Step 2: Convert to fraction form
    155.72/216 = 150.18/x
  3. Step 3: Cross multiply
    155.72x = 216 × 150.18
  4. Step 4: Simplify right side
    155.72x = 32,438.88
  5. Step 5: Solve for x
    x = 32,438.88/155.72
  6. Step 6: Final answer
    x = 208.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.