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Finding the Fourth Proportional to 708.27, 977.44 and 428.48

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Solution

The fourth proportional to 708.27, 977.44 and 428.48 is: 591.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.27 : 977.44 = 428.48 : x
  2. Step 2: Convert to fraction form
    708.27/977.44 = 428.48/x
  3. Step 3: Cross multiply
    708.27x = 977.44 × 428.48
  4. Step 4: Simplify right side
    708.27x = 418,813.49
  5. Step 5: Solve for x
    x = 418,813.49/708.27
  6. Step 6: Final answer
    x = 591.32

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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.