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Finding the Fourth Proportional to 698.27, 964.62 and 558.21

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Solution

The fourth proportional to 698.27, 964.62 and 558.21 is: 771.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.27 : 964.62 = 558.21 : x
  2. Step 2: Convert to fraction form
    698.27/964.62 = 558.21/x
  3. Step 3: Cross multiply
    698.27x = 964.62 × 558.21
  4. Step 4: Simplify right side
    698.27x = 538,460.53
  5. Step 5: Solve for x
    x = 538,460.53/698.27
  6. Step 6: Final answer
    x = 771.13

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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.