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Finding the Fourth Proportional to 739.23, 1,109.01 and 252.30

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Solution

The fourth proportional to 739.23, 1,109.01 and 252.30 is: 378.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.23 : 1,109.01 = 252.30 : x
  2. Step 2: Convert to fraction form
    739.23/1,109.01 = 252.30/x
  3. Step 3: Cross multiply
    739.23x = 1,109.01 × 252.30
  4. Step 4: Simplify right side
    739.23x = 279,803.22
  5. Step 5: Solve for x
    x = 279,803.22/739.23
  6. Step 6: Final answer
    x = 378.51

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Double scale
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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.