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Finding the Fourth Proportional to 1,329.31, 1,994.19 and 404.66

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Solution

The fourth proportional to 1,329.31, 1,994.19 and 404.66 is: 607.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.31 : 1,994.19 = 404.66 : x
  2. Step 2: Convert to fraction form
    1,329.31/1,994.19 = 404.66/x
  3. Step 3: Cross multiply
    1,329.31x = 1,994.19 × 404.66
  4. Step 4: Simplify right side
    1,329.31x = 806,968.93
  5. Step 5: Solve for x
    x = 806,968.93/1,329.31
  6. Step 6: Final answer
    x = 607.06

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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.