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Finding the Fourth Proportional to 722.64, 996.72 and 501.60

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Solution

The fourth proportional to 722.64, 996.72 and 501.60 is: 691.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.64 : 996.72 = 501.60 : x
  2. Step 2: Convert to fraction form
    722.64/996.72 = 501.60/x
  3. Step 3: Cross multiply
    722.64x = 996.72 × 501.60
  4. Step 4: Simplify right side
    722.64x = 499,954.75
  5. Step 5: Solve for x
    x = 499,954.75/722.64
  6. Step 6: Final answer
    x = 691.84

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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.