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Finding the Fourth Proportional to 698.36, 1,044.44 and 621.88

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Solution

The fourth proportional to 698.36, 1,044.44 and 621.88 is: 930.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.36 : 1,044.44 = 621.88 : x
  2. Step 2: Convert to fraction form
    698.36/1,044.44 = 621.88/x
  3. Step 3: Cross multiply
    698.36x = 1,044.44 × 621.88
  4. Step 4: Simplify right side
    698.36x = 649,516.35
  5. Step 5: Solve for x
    x = 649,516.35/698.36
  6. Step 6: Final answer
    x = 930.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.