Home / 3,655.60-5,476.20-2,190.40

Finding the Fourth Proportional to 3,655.60, 5,476.20 and 2,190.40

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Solution

The fourth proportional to 3,655.60, 5,476.20 and 2,190.40 is: 3,281.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,655.60 : 5,476.20 = 2,190.40 : x
  2. Step 2: Convert to fraction form
    3,655.60/5,476.20 = 2,190.40/x
  3. Step 3: Cross multiply
    3,655.60x = 5,476.20 × 2,190.40
  4. Step 4: Simplify right side
    3,655.60x = 11,995,068.48
  5. Step 5: Solve for x
    x = 11,995,068.48/3,655.60
  6. Step 6: Final answer
    x = 3,281.29

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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.