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Finding the Fourth Proportional to 699.72, 1,050.30 and 481.20

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Solution

The fourth proportional to 699.72, 1,050.30 and 481.20 is: 722.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.72 : 1,050.30 = 481.20 : x
  2. Step 2: Convert to fraction form
    699.72/1,050.30 = 481.20/x
  3. Step 3: Cross multiply
    699.72x = 1,050.30 × 481.20
  4. Step 4: Simplify right side
    699.72x = 505,404.36
  5. Step 5: Solve for x
    x = 505,404.36/699.72
  6. Step 6: Final answer
    x = 722.30

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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.