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Finding the Fourth Proportional to 708.06, 1,061.42 and 447.27

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Solution

The fourth proportional to 708.06, 1,061.42 and 447.27 is: 670.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.06 : 1,061.42 = 447.27 : x
  2. Step 2: Convert to fraction form
    708.06/1,061.42 = 447.27/x
  3. Step 3: Cross multiply
    708.06x = 1,061.42 × 447.27
  4. Step 4: Simplify right side
    708.06x = 474,736.02
  5. Step 5: Solve for x
    x = 474,736.02/708.06
  6. Step 6: Final answer
    x = 670.47

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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.