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Finding the Fourth Proportional to 698.11, 963.44 and 581.47

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Solution

The fourth proportional to 698.11, 963.44 and 581.47 is: 802.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.11 : 963.44 = 581.47 : x
  2. Step 2: Convert to fraction form
    698.11/963.44 = 581.47/x
  3. Step 3: Cross multiply
    698.11x = 963.44 × 581.47
  4. Step 4: Simplify right side
    698.11x = 560,211.46
  5. Step 5: Solve for x
    x = 560,211.46/698.11
  6. Step 6: Final answer
    x = 802.47

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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.