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Finding the Fourth Proportional to 1,206.62, 1,665.24 and 682.82

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Solution

The fourth proportional to 1,206.62, 1,665.24 and 682.82 is: 942.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.62 : 1,665.24 = 682.82 : x
  2. Step 2: Convert to fraction form
    1,206.62/1,665.24 = 682.82/x
  3. Step 3: Cross multiply
    1,206.62x = 1,665.24 × 682.82
  4. Step 4: Simplify right side
    1,206.62x = 1,137,059.18
  5. Step 5: Solve for x
    x = 1,137,059.18/1,206.62
  6. Step 6: Final answer
    x = 942.35

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1.5x scale

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.