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Finding the Fourth Proportional to 708.26, 977.49 and 397.82

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Solution

The fourth proportional to 708.26, 977.49 and 397.82 is: 549.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.26 : 977.49 = 397.82 : x
  2. Step 2: Convert to fraction form
    708.26/977.49 = 397.82/x
  3. Step 3: Cross multiply
    708.26x = 977.49 × 397.82
  4. Step 4: Simplify right side
    708.26x = 388,865.07
  5. Step 5: Solve for x
    x = 388,865.07/708.26
  6. Step 6: Final answer
    x = 549.04

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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.