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Finding the Fourth Proportional to 819.46, 1,131.96 and 761.14

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Solution

The fourth proportional to 819.46, 1,131.96 and 761.14 is: 1,051.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    819.46 : 1,131.96 = 761.14 : x
  2. Step 2: Convert to fraction form
    819.46/1,131.96 = 761.14/x
  3. Step 3: Cross multiply
    819.46x = 1,131.96 × 761.14
  4. Step 4: Simplify right side
    819.46x = 861,580.03
  5. Step 5: Solve for x
    x = 861,580.03/819.46
  6. Step 6: Final answer
    x = 1,051.40

Related Problems

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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.