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Finding the Fourth Proportional to 3,518.74, 5,278.11 and 886.27

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Solution

The fourth proportional to 3,518.74, 5,278.11 and 886.27 is: 1,329.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,518.74 : 5,278.11 = 886.27 : x
  2. Step 2: Convert to fraction form
    3,518.74/5,278.11 = 886.27/x
  3. Step 3: Cross multiply
    3,518.74x = 5,278.11 × 886.27
  4. Step 4: Simplify right side
    3,518.74x = 4,677,803.14
  5. Step 5: Solve for x
    x = 4,677,803.14/3,518.74
  6. Step 6: Final answer
    x = 1,329.40

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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.