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Finding the Fourth Proportional to 2,613.15, 3,920.99 and 1,296.99

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Solution

The fourth proportional to 2,613.15, 3,920.99 and 1,296.99 is: 1,946.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,613.15 : 3,920.99 = 1,296.99 : x
  2. Step 2: Convert to fraction form
    2,613.15/3,920.99 = 1,296.99/x
  3. Step 3: Cross multiply
    2,613.15x = 3,920.99 × 1,296.99
  4. Step 4: Simplify right side
    2,613.15x = 5,085,478.34
  5. Step 5: Solve for x
    x = 5,085,478.34/2,613.15
  6. Step 6: Final answer
    x = 1,946.11

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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.