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Finding the Fourth Proportional to 697.76, 962.89 and 394.91

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Solution

The fourth proportional to 697.76, 962.89 and 394.91 is: 544.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.76 : 962.89 = 394.91 : x
  2. Step 2: Convert to fraction form
    697.76/962.89 = 394.91/x
  3. Step 3: Cross multiply
    697.76x = 962.89 × 394.91
  4. Step 4: Simplify right side
    697.76x = 380,250.08
  5. Step 5: Solve for x
    x = 380,250.08/697.76
  6. Step 6: Final answer
    x = 544.96

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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.