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Finding the Fourth Proportional to 1,640.35, 2,460.57 and 666.37

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Solution

The fourth proportional to 1,640.35, 2,460.57 and 666.37 is: 999.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,640.35 : 2,460.57 = 666.37 : x
  2. Step 2: Convert to fraction form
    1,640.35/2,460.57 = 666.37/x
  3. Step 3: Cross multiply
    1,640.35x = 2,460.57 × 666.37
  4. Step 4: Simplify right side
    1,640.35x = 1,639,650.03
  5. Step 5: Solve for x
    x = 1,639,650.03/1,640.35
  6. Step 6: Final answer
    x = 999.57

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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.