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Finding the Fourth Proportional to 772.80, 1,066.38 and 441.21

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Solution

The fourth proportional to 772.80, 1,066.38 and 441.21 is: 608.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    772.80 : 1,066.38 = 441.21 : x
  2. Step 2: Convert to fraction form
    772.80/1,066.38 = 441.21/x
  3. Step 3: Cross multiply
    772.80x = 1,066.38 × 441.21
  4. Step 4: Simplify right side
    772.80x = 470,497.52
  5. Step 5: Solve for x
    x = 470,497.52/772.80
  6. Step 6: Final answer
    x = 608.82

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Double 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.