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Finding the Fourth Proportional to 155.91, 215.14 and 150.67

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Solution

The fourth proportional to 155.91, 215.14 and 150.67 is: 207.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.91 : 215.14 = 150.67 : x
  2. Step 2: Convert to fraction form
    155.91/215.14 = 150.67/x
  3. Step 3: Cross multiply
    155.91x = 215.14 × 150.67
  4. Step 4: Simplify right side
    155.91x = 32,415.14
  5. Step 5: Solve for x
    x = 32,415.14/155.91
  6. Step 6: Final answer
    x = 207.91

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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.