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Finding the Fourth Proportional to 440.20, 659.86 and 310.20

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Solution

The fourth proportional to 440.20, 659.86 and 310.20 is: 464.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    440.20 : 659.86 = 310.20 : x
  2. Step 2: Convert to fraction form
    440.20/659.86 = 310.20/x
  3. Step 3: Cross multiply
    440.20x = 659.86 × 310.20
  4. Step 4: Simplify right side
    440.20x = 204,688.57
  5. Step 5: Solve for x
    x = 204,688.57/440.20
  6. Step 6: Final answer
    x = 464.99

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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.