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Finding the Fourth Proportional to 470.44, 705.64 and 287.88

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Solution

The fourth proportional to 470.44, 705.64 and 287.88 is: 431.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    470.44 : 705.64 = 287.88 : x
  2. Step 2: Convert to fraction form
    470.44/705.64 = 287.88/x
  3. Step 3: Cross multiply
    470.44x = 705.64 × 287.88
  4. Step 4: Simplify right side
    470.44x = 203,139.64
  5. Step 5: Solve for x
    x = 203,139.64/470.44
  6. Step 6: Final answer
    x = 431.81

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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.