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Finding the Fourth Proportional to 1,803.90, 2,490.57 and 1,679.85

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Solution

The fourth proportional to 1,803.90, 2,490.57 and 1,679.85 is: 2,319.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,803.90 : 2,490.57 = 1,679.85 : x
  2. Step 2: Convert to fraction form
    1,803.90/2,490.57 = 1,679.85/x
  3. Step 3: Cross multiply
    1,803.90x = 2,490.57 × 1,679.85
  4. Step 4: Simplify right side
    1,803.90x = 4,183,784.01
  5. Step 5: Solve for x
    x = 4,183,784.01/1,803.90
  6. Step 6: Final answer
    x = 2,319.30

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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.