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Finding the Fourth Proportional to 722.48, 996.26 and 486.43

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Solution

The fourth proportional to 722.48, 996.26 and 486.43 is: 670.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.48 : 996.26 = 486.43 : x
  2. Step 2: Convert to fraction form
    722.48/996.26 = 486.43/x
  3. Step 3: Cross multiply
    722.48x = 996.26 × 486.43
  4. Step 4: Simplify right side
    722.48x = 484,605.77
  5. Step 5: Solve for x
    x = 484,605.77/722.48
  6. Step 6: Final answer
    x = 670.76

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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.