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Finding the Fourth Proportional to 739.99, 1,109.67 and 253.07

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Solution

The fourth proportional to 739.99, 1,109.67 and 253.07 is: 379.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    739.99 : 1,109.67 = 253.07 : x
  2. Step 2: Convert to fraction form
    739.99/1,109.67 = 253.07/x
  3. Step 3: Cross multiply
    739.99x = 1,109.67 × 253.07
  4. Step 4: Simplify right side
    739.99x = 280,824.19
  5. Step 5: Solve for x
    x = 280,824.19/739.99
  6. Step 6: Final answer
    x = 379.50

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.