Home / 4,327.20-6,490.80-3,218.40

Finding the Fourth Proportional to 4,327.20, 6,490.80 and 3,218.40

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Solution

The fourth proportional to 4,327.20, 6,490.80 and 3,218.40 is: 4,827.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,327.20 : 6,490.80 = 3,218.40 : x
  2. Step 2: Convert to fraction form
    4,327.20/6,490.80 = 3,218.40/x
  3. Step 3: Cross multiply
    4,327.20x = 6,490.80 × 3,218.40
  4. Step 4: Simplify right side
    4,327.20x = 20,889,990.72
  5. Step 5: Solve for x
    x = 20,889,990.72/4,327.20
  6. Step 6: Final answer
    x = 4,827.60

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Similar ratio
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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.