Home / 3,617.48-4,990.20-2,439.20

Finding the Fourth Proportional to 3,617.48, 4,990.20 and 2,439.20

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Solution

The fourth proportional to 3,617.48, 4,990.20 and 2,439.20 is: 3,364.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,617.48 : 4,990.20 = 2,439.20 : x
  2. Step 2: Convert to fraction form
    3,617.48/4,990.20 = 2,439.20/x
  3. Step 3: Cross multiply
    3,617.48x = 4,990.20 × 2,439.20
  4. Step 4: Simplify right side
    3,617.48x = 12,172,095.84
  5. Step 5: Solve for x
    x = 12,172,095.84/3,617.48
  6. Step 6: Final answer
    x = 3,364.80

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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.