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Finding the Fourth Proportional to 811.04, 1,218.71 and 441.07

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Solution

The fourth proportional to 811.04, 1,218.71 and 441.07 is: 662.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    811.04 : 1,218.71 = 441.07 : x
  2. Step 2: Convert to fraction form
    811.04/1,218.71 = 441.07/x
  3. Step 3: Cross multiply
    811.04x = 1,218.71 × 441.07
  4. Step 4: Simplify right side
    811.04x = 537,534.48
  5. Step 5: Solve for x
    x = 537,534.48/811.04
  6. Step 6: Final answer
    x = 662.78

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.