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Finding the Fourth Proportional to 613.72, 920.70 and 202.88

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Solution

The fourth proportional to 613.72, 920.70 and 202.88 is: 304.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.72 : 920.70 = 202.88 : x
  2. Step 2: Convert to fraction form
    613.72/920.70 = 202.88/x
  3. Step 3: Cross multiply
    613.72x = 920.70 × 202.88
  4. Step 4: Simplify right side
    613.72x = 186,791.62
  5. Step 5: Solve for x
    x = 186,791.62/613.72
  6. Step 6: Final answer
    x = 304.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.