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Finding the Fourth Proportional to 746.04, 1,119.36 and 399.78

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Solution

The fourth proportional to 746.04, 1,119.36 and 399.78 is: 599.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    746.04 : 1,119.36 = 399.78 : x
  2. Step 2: Convert to fraction form
    746.04/1,119.36 = 399.78/x
  3. Step 3: Cross multiply
    746.04x = 1,119.36 × 399.78
  4. Step 4: Simplify right side
    746.04x = 447,497.74
  5. Step 5: Solve for x
    x = 447,497.74/746.04
  6. Step 6: Final answer
    x = 599.83

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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.