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Finding the Fourth Proportional to 697.80, 962.94 and 399.02

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Solution

The fourth proportional to 697.80, 962.94 and 399.02 is: 550.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    697.80 : 962.94 = 399.02 : x
  2. Step 2: Convert to fraction form
    697.80/962.94 = 399.02/x
  3. Step 3: Cross multiply
    697.80x = 962.94 × 399.02
  4. Step 4: Simplify right side
    697.80x = 384,232.32
  5. Step 5: Solve for x
    x = 384,232.32/697.80
  6. Step 6: Final answer
    x = 550.63

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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.