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Finding the Fourth Proportional to 698.96, 1,048.32 and 425

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Solution

The fourth proportional to 698.96, 1,048.32 and 425 is: 637.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.96 : 1,048.32 = 425 : x
  2. Step 2: Convert to fraction form
    698.96/1,048.32 = 425/x
  3. Step 3: Cross multiply
    698.96x = 1,048.32 × 425
  4. Step 4: Simplify right side
    698.96x = 445,536
  5. Step 5: Solve for x
    x = 445,536/698.96
  6. Step 6: Final answer
    x = 637.43

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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.