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Finding the Fourth Proportional to 1,664.24, 2,496.54 and 786.68

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Solution

The fourth proportional to 1,664.24, 2,496.54 and 786.68 is: 1,180.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,664.24 : 2,496.54 = 786.68 : x
  2. Step 2: Convert to fraction form
    1,664.24/2,496.54 = 786.68/x
  3. Step 3: Cross multiply
    1,664.24x = 2,496.54 × 786.68
  4. Step 4: Simplify right side
    1,664.24x = 1,963,978.09
  5. Step 5: Solve for x
    x = 1,963,978.09/1,664.24
  6. Step 6: Final answer
    x = 1,180.11

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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.