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Finding the Fourth Proportional to 708.73, 978.53 and 443.27

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Solution

The fourth proportional to 708.73, 978.53 and 443.27 is: 612.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.73 : 978.53 = 443.27 : x
  2. Step 2: Convert to fraction form
    708.73/978.53 = 443.27/x
  3. Step 3: Cross multiply
    708.73x = 978.53 × 443.27
  4. Step 4: Simplify right side
    708.73x = 433,753.22
  5. Step 5: Solve for x
    x = 433,753.22/708.73
  6. Step 6: Final answer
    x = 612.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.