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Finding the Fourth Proportional to 1,199.76, 1,798.96 and 419.44

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Solution

The fourth proportional to 1,199.76, 1,798.96 and 419.44 is: 628.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.76 : 1,798.96 = 419.44 : x
  2. Step 2: Convert to fraction form
    1,199.76/1,798.96 = 419.44/x
  3. Step 3: Cross multiply
    1,199.76x = 1,798.96 × 419.44
  4. Step 4: Simplify right side
    1,199.76x = 754,555.78
  5. Step 5: Solve for x
    x = 754,555.78/1,199.76
  6. Step 6: Final answer
    x = 628.92

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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.