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Finding the Fourth Proportional to 611.72, 917.64 and 303.27

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Solution

The fourth proportional to 611.72, 917.64 and 303.27 is: 454.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.72 : 917.64 = 303.27 : x
  2. Step 2: Convert to fraction form
    611.72/917.64 = 303.27/x
  3. Step 3: Cross multiply
    611.72x = 917.64 × 303.27
  4. Step 4: Simplify right side
    611.72x = 278,289.24
  5. Step 5: Solve for x
    x = 278,289.24/611.72
  6. Step 6: Final answer
    x = 454.93

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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.