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Finding the Fourth Proportional to 722.98, 1,086.67 and 480.98

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Solution

The fourth proportional to 722.98, 1,086.67 and 480.98 is: 722.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.98 : 1,086.67 = 480.98 : x
  2. Step 2: Convert to fraction form
    722.98/1,086.67 = 480.98/x
  3. Step 3: Cross multiply
    722.98x = 1,086.67 × 480.98
  4. Step 4: Simplify right side
    722.98x = 522,666.54
  5. Step 5: Solve for x
    x = 522,666.54/722.98
  6. Step 6: Final answer
    x = 722.93

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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.