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Finding the Fourth Proportional to 1,206.64, 1,665.13 and 682.66

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Solution

The fourth proportional to 1,206.64, 1,665.13 and 682.66 is: 942.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.64 : 1,665.13 = 682.66 : x
  2. Step 2: Convert to fraction form
    1,206.64/1,665.13 = 682.66/x
  3. Step 3: Cross multiply
    1,206.64x = 1,665.13 × 682.66
  4. Step 4: Simplify right side
    1,206.64x = 1,136,717.65
  5. Step 5: Solve for x
    x = 1,136,717.65/1,206.64
  6. Step 6: Final answer
    x = 942.05

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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.