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Finding the Fourth Proportional to 707.37, 976.17 and 396.87

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Solution

The fourth proportional to 707.37, 976.17 and 396.87 is: 547.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.37 : 976.17 = 396.87 : x
  2. Step 2: Convert to fraction form
    707.37/976.17 = 396.87/x
  3. Step 3: Cross multiply
    707.37x = 976.17 × 396.87
  4. Step 4: Simplify right side
    707.37x = 387,412.59
  5. Step 5: Solve for x
    x = 387,412.59/707.37
  6. Step 6: Final answer
    x = 547.68

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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.