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Finding the Fourth Proportional to 697.70, 962.82 and 402.98

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Solution

The fourth proportional to 697.70, 962.82 and 402.98 is: 556.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.70 : 962.82 = 402.98 : x
  2. Step 2: Convert to fraction form
    697.70/962.82 = 402.98/x
  3. Step 3: Cross multiply
    697.70x = 962.82 × 402.98
  4. Step 4: Simplify right side
    697.70x = 387,997.20
  5. Step 5: Solve for x
    x = 387,997.20/697.70
  6. Step 6: Final answer
    x = 556.11

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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.