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Finding the Fourth Proportional to 1,328.62, 1,833.42 and 739.16

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Solution

The fourth proportional to 1,328.62, 1,833.42 and 739.16 is: 1,020.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,328.62 : 1,833.42 = 739.16 : x
  2. Step 2: Convert to fraction form
    1,328.62/1,833.42 = 739.16/x
  3. Step 3: Cross multiply
    1,328.62x = 1,833.42 × 739.16
  4. Step 4: Simplify right side
    1,328.62x = 1,355,190.73
  5. Step 5: Solve for x
    x = 1,355,190.73/1,328.62
  6. Step 6: Final answer
    x = 1,020.00

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.