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Finding the Fourth Proportional to 1,640.70, 2,460.33 and 486.18

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Solution

The fourth proportional to 1,640.70, 2,460.33 and 486.18 is: 729.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.70 : 2,460.33 = 486.18 : x
  2. Step 2: Convert to fraction form
    1,640.70/2,460.33 = 486.18/x
  3. Step 3: Cross multiply
    1,640.70x = 2,460.33 × 486.18
  4. Step 4: Simplify right side
    1,640.70x = 1,196,163.24
  5. Step 5: Solve for x
    x = 1,196,163.24/1,640.70
  6. Step 6: Final answer
    x = 729.06

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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.