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Finding the Fourth Proportional to 470.13, 705.37 and 287.66

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Solution

The fourth proportional to 470.13, 705.37 and 287.66 is: 431.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.13 : 705.37 = 287.66 : x
  2. Step 2: Convert to fraction form
    470.13/705.37 = 287.66/x
  3. Step 3: Cross multiply
    470.13x = 705.37 × 287.66
  4. Step 4: Simplify right side
    470.13x = 202,906.73
  5. Step 5: Solve for x
    x = 202,906.73/470.13
  6. Step 6: Final answer
    x = 431.60

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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.