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Finding the Fourth Proportional to 1,206.88, 1,665.36 and 682.84

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Solution

The fourth proportional to 1,206.88, 1,665.36 and 682.84 is: 942.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.88 : 1,665.36 = 682.84 : x
  2. Step 2: Convert to fraction form
    1,206.88/1,665.36 = 682.84/x
  3. Step 3: Cross multiply
    1,206.88x = 1,665.36 × 682.84
  4. Step 4: Simplify right side
    1,206.88x = 1,137,174.42
  5. Step 5: Solve for x
    x = 1,137,174.42/1,206.88
  6. Step 6: Final answer
    x = 942.24

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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.