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Finding the Fourth Proportional to 707.43, 976.29 and 396.93

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Solution

The fourth proportional to 707.43, 976.29 and 396.93 is: 547.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    707.43 : 976.29 = 396.93 : x
  2. Step 2: Convert to fraction form
    707.43/976.29 = 396.93/x
  3. Step 3: Cross multiply
    707.43x = 976.29 × 396.93
  4. Step 4: Simplify right side
    707.43x = 387,518.79
  5. Step 5: Solve for x
    x = 387,518.79/707.43
  6. Step 6: Final answer
    x = 547.78

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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.