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Finding the Fourth Proportional to 153.60, 216.60 and 153.60

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Solution

The fourth proportional to 153.60, 216.60 and 153.60 is: 216.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    153.60 : 216.60 = 153.60 : x
  2. Step 2: Convert to fraction form
    153.60/216.60 = 153.60/x
  3. Step 3: Cross multiply
    153.60x = 216.60 × 153.60
  4. Step 4: Simplify right side
    153.60x = 33,269.76
  5. Step 5: Solve for x
    x = 33,269.76/153.60
  6. Step 6: Final answer
    x = 216.60

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Why These Related Problems?

These problems maintain the same ratio (1.41) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.