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Finding the Fourth Proportional to 5,487.69, 8,231.69 and 1,790.15

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Solution

The fourth proportional to 5,487.69, 8,231.69 and 1,790.15 is: 2,685.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,487.69 : 8,231.69 = 1,790.15 : x
  2. Step 2: Convert to fraction form
    5,487.69/8,231.69 = 1,790.15/x
  3. Step 3: Cross multiply
    5,487.69x = 8,231.69 × 1,790.15
  4. Step 4: Simplify right side
    5,487.69x = 14,735,909.74
  5. Step 5: Solve for x
    x = 14,735,909.74/5,487.69
  6. Step 6: Final answer
    x = 2,685.27

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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.