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Finding the Fourth Proportional to 481.47, 722.70 and 426.98

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Solution

The fourth proportional to 481.47, 722.70 and 426.98 is: 640.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    481.47 : 722.70 = 426.98 : x
  2. Step 2: Convert to fraction form
    481.47/722.70 = 426.98/x
  3. Step 3: Cross multiply
    481.47x = 722.70 × 426.98
  4. Step 4: Simplify right side
    481.47x = 308,574.83
  5. Step 5: Solve for x
    x = 308,574.83/481.47
  6. Step 6: Final answer
    x = 640.90

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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.