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Finding the Fourth Proportional to 1,447.63, 2,171.72 and 473.79

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Solution

The fourth proportional to 1,447.63, 2,171.72 and 473.79 is: 710.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,447.63 : 2,171.72 = 473.79 : x
  2. Step 2: Convert to fraction form
    1,447.63/2,171.72 = 473.79/x
  3. Step 3: Cross multiply
    1,447.63x = 2,171.72 × 473.79
  4. Step 4: Simplify right side
    1,447.63x = 1,028,939.22
  5. Step 5: Solve for x
    x = 1,028,939.22/1,447.63
  6. Step 6: Final answer
    x = 710.78

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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.