Home / 3,218.40-4,435.72-2,655.56

Finding the Fourth Proportional to 3,218.40, 4,435.72 and 2,655.56

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Solution

The fourth proportional to 3,218.40, 4,435.72 and 2,655.56 is: 3,659.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,218.40 : 4,435.72 = 2,655.56 : x
  2. Step 2: Convert to fraction form
    3,218.40/4,435.72 = 2,655.56/x
  3. Step 3: Cross multiply
    3,218.40x = 4,435.72 × 2,655.56
  4. Step 4: Simplify right side
    3,218.40x = 11,779,320.60
  5. Step 5: Solve for x
    x = 11,779,320.60/3,218.40
  6. Step 6: Final answer
    x = 3,659.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.