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Finding the Fourth Proportional to 1,206.92, 1,665.42 and 675.78

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Solution

The fourth proportional to 1,206.92, 1,665.42 and 675.78 is: 932.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,206.92 : 1,665.42 = 675.78 : x
  2. Step 2: Convert to fraction form
    1,206.92/1,665.42 = 675.78/x
  3. Step 3: Cross multiply
    1,206.92x = 1,665.42 × 675.78
  4. Step 4: Simplify right side
    1,206.92x = 1,125,457.53
  5. Step 5: Solve for x
    x = 1,125,457.53/1,206.92
  6. Step 6: Final answer
    x = 932.50

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Half scale
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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.