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Finding the Fourth Proportional to 854.79, 1,282.19 and 277.66

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Solution

The fourth proportional to 854.79, 1,282.19 and 277.66 is: 416.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    854.79 : 1,282.19 = 277.66 : x
  2. Step 2: Convert to fraction form
    854.79/1,282.19 = 277.66/x
  3. Step 3: Cross multiply
    854.79x = 1,282.19 × 277.66
  4. Step 4: Simplify right side
    854.79x = 356,012.88
  5. Step 5: Solve for x
    x = 356,012.88/854.79
  6. Step 6: Final answer
    x = 416.49

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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.