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Finding the Fourth Proportional to 1,404.60, 2,104.08 and 699.68

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Solution

The fourth proportional to 1,404.60, 2,104.08 and 699.68 is: 1,048.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,404.60 : 2,104.08 = 699.68 : x
  2. Step 2: Convert to fraction form
    1,404.60/2,104.08 = 699.68/x
  3. Step 3: Cross multiply
    1,404.60x = 2,104.08 × 699.68
  4. Step 4: Simplify right side
    1,404.60x = 1,472,183.85
  5. Step 5: Solve for x
    x = 1,472,183.85/1,404.60
  6. Step 6: Final answer
    x = 1,048.12

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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.