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Finding the Fourth Proportional to 611.69, 917.59 and 200.72

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Solution

The fourth proportional to 611.69, 917.59 and 200.72 is: 301.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.69 : 917.59 = 200.72 : x
  2. Step 2: Convert to fraction form
    611.69/917.59 = 200.72/x
  3. Step 3: Cross multiply
    611.69x = 917.59 × 200.72
  4. Step 4: Simplify right side
    611.69x = 184,180.46
  5. Step 5: Solve for x
    x = 184,180.46/611.69
  6. Step 6: Final answer
    x = 301.10

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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.