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Finding the Fourth Proportional to 810.82, 1,119.13 and 461.71

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Solution

The fourth proportional to 810.82, 1,119.13 and 461.71 is: 637.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    810.82 : 1,119.13 = 461.71 : x
  2. Step 2: Convert to fraction form
    810.82/1,119.13 = 461.71/x
  3. Step 3: Cross multiply
    810.82x = 1,119.13 × 461.71
  4. Step 4: Simplify right side
    810.82x = 516,705.61
  5. Step 5: Solve for x
    x = 516,705.61/810.82
  6. Step 6: Final answer
    x = 637.27

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Double scale
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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.