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Finding the Fourth Proportional to 3,490.02, 5,230.44 and 1,640.79

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Solution

The fourth proportional to 3,490.02, 5,230.44 and 1,640.79 is: 2,459.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,490.02 : 5,230.44 = 1,640.79 : x
  2. Step 2: Convert to fraction form
    3,490.02/5,230.44 = 1,640.79/x
  3. Step 3: Cross multiply
    3,490.02x = 5,230.44 × 1,640.79
  4. Step 4: Simplify right side
    3,490.02x = 8,582,053.65
  5. Step 5: Solve for x
    x = 8,582,053.65/3,490.02
  6. Step 6: Final answer
    x = 2,459.03

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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.