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Finding the Fourth Proportional to 155.62, 215.69 and 152.74

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Solution

The fourth proportional to 155.62, 215.69 and 152.74 is: 211.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.62 : 215.69 = 152.74 : x
  2. Step 2: Convert to fraction form
    155.62/215.69 = 152.74/x
  3. Step 3: Cross multiply
    155.62x = 215.69 × 152.74
  4. Step 4: Simplify right side
    155.62x = 32,944.49
  5. Step 5: Solve for x
    x = 32,944.49/155.62
  6. Step 6: Final answer
    x = 211.70

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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.