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Finding the Fourth Proportional to 855.46, 1,283.19 and 270.51

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Solution

The fourth proportional to 855.46, 1,283.19 and 270.51 is: 405.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    855.46 : 1,283.19 = 270.51 : x
  2. Step 2: Convert to fraction form
    855.46/1,283.19 = 270.51/x
  3. Step 3: Cross multiply
    855.46x = 1,283.19 × 270.51
  4. Step 4: Simplify right side
    855.46x = 347,107.96
  5. Step 5: Solve for x
    x = 347,107.96/855.46
  6. Step 6: Final answer
    x = 405.76

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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.