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Finding the Fourth Proportional to 1,800.90, 2,479 and 1,553.04

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Solution

The fourth proportional to 1,800.90, 2,479 and 1,553.04 is: 2,137.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,800.90 : 2,479 = 1,553.04 : x
  2. Step 2: Convert to fraction form
    1,800.90/2,479 = 1,553.04/x
  3. Step 3: Cross multiply
    1,800.90x = 2,479 × 1,553.04
  4. Step 4: Simplify right side
    1,800.90x = 3,849,986.16
  5. Step 5: Solve for x
    x = 3,849,986.16/1,800.90
  6. Step 6: Final answer
    x = 2,137.81

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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.