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Finding the Fourth Proportional to 722.87, 996.09 and 498.87

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Solution

The fourth proportional to 722.87, 996.09 and 498.87 is: 687.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.87 : 996.09 = 498.87 : x
  2. Step 2: Convert to fraction form
    722.87/996.09 = 498.87/x
  3. Step 3: Cross multiply
    722.87x = 996.09 × 498.87
  4. Step 4: Simplify right side
    722.87x = 496,919.42
  5. Step 5: Solve for x
    x = 496,919.42/722.87
  6. Step 6: Final answer
    x = 687.43

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1.5x scale

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.