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Finding the Fourth Proportional to 3,440.65, 5,160.98 and 843.57

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Solution

The fourth proportional to 3,440.65, 5,160.98 and 843.57 is: 1,265.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,440.65 : 5,160.98 = 843.57 : x
  2. Step 2: Convert to fraction form
    3,440.65/5,160.98 = 843.57/x
  3. Step 3: Cross multiply
    3,440.65x = 5,160.98 × 843.57
  4. Step 4: Simplify right side
    3,440.65x = 4,353,617.88
  5. Step 5: Solve for x
    x = 4,353,617.88/3,440.65
  6. Step 6: Final answer
    x = 1,265.35

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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.