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Finding the Fourth Proportional to 3,409.40, 5,114.10 and 1,854.20

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Solution

The fourth proportional to 3,409.40, 5,114.10 and 1,854.20 is: 2,781.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,409.40 : 5,114.10 = 1,854.20 : x
  2. Step 2: Convert to fraction form
    3,409.40/5,114.10 = 1,854.20/x
  3. Step 3: Cross multiply
    3,409.40x = 5,114.10 × 1,854.20
  4. Step 4: Simplify right side
    3,409.40x = 9,482,564.22
  5. Step 5: Solve for x
    x = 9,482,564.22/3,409.40
  6. Step 6: Final answer
    x = 2,781.30

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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.