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Finding the Fourth Proportional to 722.82, 998.07 and 667.54

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Solution

The fourth proportional to 722.82, 998.07 and 667.54 is: 921.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.82 : 998.07 = 667.54 : x
  2. Step 2: Convert to fraction form
    722.82/998.07 = 667.54/x
  3. Step 3: Cross multiply
    722.82x = 998.07 × 667.54
  4. Step 4: Simplify right side
    722.82x = 666,254.15
  5. Step 5: Solve for x
    x = 666,254.15/722.82
  6. Step 6: Final answer
    x = 921.74

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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.