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Finding the Fourth Proportional to 708.24, 977.36 and 397.74

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Solution

The fourth proportional to 708.24, 977.36 and 397.74 is: 548.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.24 : 977.36 = 397.74 : x
  2. Step 2: Convert to fraction form
    708.24/977.36 = 397.74/x
  3. Step 3: Cross multiply
    708.24x = 977.36 × 397.74
  4. Step 4: Simplify right side
    708.24x = 388,736.16
  5. Step 5: Solve for x
    x = 388,736.16/708.24
  6. Step 6: Final answer
    x = 548.88

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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.