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Finding the Fourth Proportional to 3,409.66, 5,114.28 and 1,218.28

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Solution

The fourth proportional to 3,409.66, 5,114.28 and 1,218.28 is: 1,827.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,409.66 : 5,114.28 = 1,218.28 : x
  2. Step 2: Convert to fraction form
    3,409.66/5,114.28 = 1,218.28/x
  3. Step 3: Cross multiply
    3,409.66x = 5,114.28 × 1,218.28
  4. Step 4: Simplify right side
    3,409.66x = 6,230,625.04
  5. Step 5: Solve for x
    x = 6,230,625.04/3,409.66
  6. Step 6: Final answer
    x = 1,827.34

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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.