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Finding the Fourth Proportional to 739.11, 1,108.56 and 328.23

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Solution

The fourth proportional to 739.11, 1,108.56 and 328.23 is: 492.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.11 : 1,108.56 = 328.23 : x
  2. Step 2: Convert to fraction form
    739.11/1,108.56 = 328.23/x
  3. Step 3: Cross multiply
    739.11x = 1,108.56 × 328.23
  4. Step 4: Simplify right side
    739.11x = 363,862.65
  5. Step 5: Solve for x
    x = 363,862.65/739.11
  6. Step 6: Final answer
    x = 492.30

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1.5x scale

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.