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Finding the Fourth Proportional to 698.58, 964.02 and 403.90

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Solution

The fourth proportional to 698.58, 964.02 and 403.90 is: 557.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.58 : 964.02 = 403.90 : x
  2. Step 2: Convert to fraction form
    698.58/964.02 = 403.90/x
  3. Step 3: Cross multiply
    698.58x = 964.02 × 403.90
  4. Step 4: Simplify right side
    698.58x = 389,367.68
  5. Step 5: Solve for x
    x = 389,367.68/698.58
  6. Step 6: Final answer
    x = 557.37

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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.