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Finding the Fourth Proportional to 708.04, 977.14 and 397.56

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Solution

The fourth proportional to 708.04, 977.14 and 397.56 is: 548.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.04 : 977.14 = 397.56 : x
  2. Step 2: Convert to fraction form
    708.04/977.14 = 397.56/x
  3. Step 3: Cross multiply
    708.04x = 977.14 × 397.56
  4. Step 4: Simplify right side
    708.04x = 388,471.78
  5. Step 5: Solve for x
    x = 388,471.78/708.04
  6. Step 6: Final answer
    x = 548.66

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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.