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Finding the Fourth Proportional to 2,127.79, 3,192.09 and 666.82

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Solution

The fourth proportional to 2,127.79, 3,192.09 and 666.82 is: 1,000.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,127.79 : 3,192.09 = 666.82 : x
  2. Step 2: Convert to fraction form
    2,127.79/3,192.09 = 666.82/x
  3. Step 3: Cross multiply
    2,127.79x = 3,192.09 × 666.82
  4. Step 4: Simplify right side
    2,127.79x = 2,128,549.45
  5. Step 5: Solve for x
    x = 2,128,549.45/2,127.79
  6. Step 6: Final answer
    x = 1,000.36

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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.