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Finding the Fourth Proportional to 3,487.83, 5,231.71 and 890.74

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Solution

The fourth proportional to 3,487.83, 5,231.71 and 890.74 is: 1,336.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,487.83 : 5,231.71 = 890.74 : x
  2. Step 2: Convert to fraction form
    3,487.83/5,231.71 = 890.74/x
  3. Step 3: Cross multiply
    3,487.83x = 5,231.71 × 890.74
  4. Step 4: Simplify right side
    3,487.83x = 4,660,093.37
  5. Step 5: Solve for x
    x = 4,660,093.37/3,487.83
  6. Step 6: Final answer
    x = 1,336.10

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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.