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Finding the Fourth Proportional to 1,186.66, 1,637.46 and 662.68

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Solution

The fourth proportional to 1,186.66, 1,637.46 and 662.68 is: 914.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,186.66 : 1,637.46 = 662.68 : x
  2. Step 2: Convert to fraction form
    1,186.66/1,637.46 = 662.68/x
  3. Step 3: Cross multiply
    1,186.66x = 1,637.46 × 662.68
  4. Step 4: Simplify right side
    1,186.66x = 1,085,111.99
  5. Step 5: Solve for x
    x = 1,085,111.99/1,186.66
  6. Step 6: Final answer
    x = 914.43

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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.