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Finding the Fourth Proportional to 719.25, 1,079.55 and 329.46

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Solution

The fourth proportional to 719.25, 1,079.55 and 329.46 is: 494.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    719.25 : 1,079.55 = 329.46 : x
  2. Step 2: Convert to fraction form
    719.25/1,079.55 = 329.46/x
  3. Step 3: Cross multiply
    719.25x = 1,079.55 × 329.46
  4. Step 4: Simplify right side
    719.25x = 355,668.54
  5. Step 5: Solve for x
    x = 355,668.54/719.25
  6. Step 6: Final answer
    x = 494.50

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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.