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Finding the Fourth Proportional to 613.69, 920.54 and 157.69

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Solution

The fourth proportional to 613.69, 920.54 and 157.69 is: 236.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    613.69 : 920.54 = 157.69 : x
  2. Step 2: Convert to fraction form
    613.69/920.54 = 157.69/x
  3. Step 3: Cross multiply
    613.69x = 920.54 × 157.69
  4. Step 4: Simplify right side
    613.69x = 145,156.86
  5. Step 5: Solve for x
    x = 145,156.86/613.69
  6. Step 6: Final answer
    x = 236.53

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Similar ratio
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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.