Home / 2,487.20-3,730.80-2,218.40

Finding the Fourth Proportional to 2,487.20, 3,730.80 and 2,218.40

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Solution

The fourth proportional to 2,487.20, 3,730.80 and 2,218.40 is: 3,327.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,487.20 : 3,730.80 = 2,218.40 : x
  2. Step 2: Convert to fraction form
    2,487.20/3,730.80 = 2,218.40/x
  3. Step 3: Cross multiply
    2,487.20x = 3,730.80 × 2,218.40
  4. Step 4: Simplify right side
    2,487.20x = 8,276,406.72
  5. Step 5: Solve for x
    x = 8,276,406.72/2,487.20
  6. Step 6: Final answer
    x = 3,327.60

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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.