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Finding the Fourth Proportional to 470.21, 705.72 and 308.12

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Solution

The fourth proportional to 470.21, 705.72 and 308.12 is: 462.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.21 : 705.72 = 308.12 : x
  2. Step 2: Convert to fraction form
    470.21/705.72 = 308.12/x
  3. Step 3: Cross multiply
    470.21x = 705.72 × 308.12
  4. Step 4: Simplify right side
    470.21x = 217,446.45
  5. Step 5: Solve for x
    x = 217,446.45/470.21
  6. Step 6: Final answer
    x = 462.45

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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.