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Finding the Fourth Proportional to 611.86, 917.96 and 303.63

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Solution

The fourth proportional to 611.86, 917.96 and 303.63 is: 455.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    611.86 : 917.96 = 303.63 : x
  2. Step 2: Convert to fraction form
    611.86/917.96 = 303.63/x
  3. Step 3: Cross multiply
    611.86x = 917.96 × 303.63
  4. Step 4: Simplify right side
    611.86x = 278,722.11
  5. Step 5: Solve for x
    x = 278,722.11/611.86
  6. Step 6: Final answer
    x = 455.53

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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.