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Finding the Fourth Proportional to 3,609.85, 4,981.60 and 1,953.85

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Solution

The fourth proportional to 3,609.85, 4,981.60 and 1,953.85 is: 2,696.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,609.85 : 4,981.60 = 1,953.85 : x
  2. Step 2: Convert to fraction form
    3,609.85/4,981.60 = 1,953.85/x
  3. Step 3: Cross multiply
    3,609.85x = 4,981.60 × 1,953.85
  4. Step 4: Simplify right side
    3,609.85x = 9,733,299.16
  5. Step 5: Solve for x
    x = 9,733,299.16/3,609.85
  6. Step 6: Final answer
    x = 2,696.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.