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Finding the Fourth Proportional to 1,179.61, 1,769.19 and 400.04

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Solution

The fourth proportional to 1,179.61, 1,769.19 and 400.04 is: 599.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,179.61 : 1,769.19 = 400.04 : x
  2. Step 2: Convert to fraction form
    1,179.61/1,769.19 = 400.04/x
  3. Step 3: Cross multiply
    1,179.61x = 1,769.19 × 400.04
  4. Step 4: Simplify right side
    1,179.61x = 707,745.31
  5. Step 5: Solve for x
    x = 707,745.31/1,179.61
  6. Step 6: Final answer
    x = 599.98

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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.