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Finding the Fourth Proportional to 201.60, 303.48 and 153.72

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Solution

The fourth proportional to 201.60, 303.48 and 153.72 is: 231.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.60 : 303.48 = 153.72 : x
  2. Step 2: Convert to fraction form
    201.60/303.48 = 153.72/x
  3. Step 3: Cross multiply
    201.60x = 303.48 × 153.72
  4. Step 4: Simplify right side
    201.60x = 46,650.95
  5. Step 5: Solve for x
    x = 46,650.95/201.60
  6. Step 6: Final answer
    x = 231.40

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.