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Finding the Fourth Proportional to 440.49, 661.04 and 303.66

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Solution

The fourth proportional to 440.49, 661.04 and 303.66 is: 455.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.49 : 661.04 = 303.66 : x
  2. Step 2: Convert to fraction form
    440.49/661.04 = 303.66/x
  3. Step 3: Cross multiply
    440.49x = 661.04 × 303.66
  4. Step 4: Simplify right side
    440.49x = 200,729.89
  5. Step 5: Solve for x
    x = 200,729.89/440.49
  6. Step 6: Final answer
    x = 455.70

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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.