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Finding the Fourth Proportional to 2,190.01, 3,285.19 and 689.37

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Solution

The fourth proportional to 2,190.01, 3,285.19 and 689.37 is: 1,034.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,190.01 : 3,285.19 = 689.37 : x
  2. Step 2: Convert to fraction form
    2,190.01/3,285.19 = 689.37/x
  3. Step 3: Cross multiply
    2,190.01x = 3,285.19 × 689.37
  4. Step 4: Simplify right side
    2,190.01x = 2,264,710.67
  5. Step 5: Solve for x
    x = 2,264,710.67/2,190.01
  6. Step 6: Final answer
    x = 1,034.11

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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.