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Finding the Fourth Proportional to 739.37, 1,109.21 and 245.75

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Solution

The fourth proportional to 739.37, 1,109.21 and 245.75 is: 368.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.37 : 1,109.21 = 245.75 : x
  2. Step 2: Convert to fraction form
    739.37/1,109.21 = 245.75/x
  3. Step 3: Cross multiply
    739.37x = 1,109.21 × 245.75
  4. Step 4: Simplify right side
    739.37x = 272,588.36
  5. Step 5: Solve for x
    x = 272,588.36/739.37
  6. Step 6: Final answer
    x = 368.68

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.