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Finding the Fourth Proportional to 698.98, 963.90 and 551.32

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Solution

The fourth proportional to 698.98, 963.90 and 551.32 is: 760.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.98 : 963.90 = 551.32 : x
  2. Step 2: Convert to fraction form
    698.98/963.90 = 551.32/x
  3. Step 3: Cross multiply
    698.98x = 963.90 × 551.32
  4. Step 4: Simplify right side
    698.98x = 531,417.35
  5. Step 5: Solve for x
    x = 531,417.35/698.98
  6. Step 6: Final answer
    x = 760.28

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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.