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Finding the Fourth Proportional to 2,605.54, 3,906.12 and 1,218.15

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Solution

The fourth proportional to 2,605.54, 3,906.12 and 1,218.15 is: 1,826.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,605.54 : 3,906.12 = 1,218.15 : x
  2. Step 2: Convert to fraction form
    2,605.54/3,906.12 = 1,218.15/x
  3. Step 3: Cross multiply
    2,605.54x = 3,906.12 × 1,218.15
  4. Step 4: Simplify right side
    2,605.54x = 4,758,240.08
  5. Step 5: Solve for x
    x = 4,758,240.08/2,605.54
  6. Step 6: Final answer
    x = 1,826.20

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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.