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Finding the Fourth Proportional to 155.60, 218.20 and 155.60

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Solution

The fourth proportional to 155.60, 218.20 and 155.60 is: 218.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    155.60 : 218.20 = 155.60 : x
  2. Step 2: Convert to fraction form
    155.60/218.20 = 155.60/x
  3. Step 3: Cross multiply
    155.60x = 218.20 × 155.60
  4. Step 4: Simplify right side
    155.60x = 33,951.92
  5. Step 5: Solve for x
    x = 33,951.92/155.60
  6. Step 6: Final answer
    x = 218.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.