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Finding the Fourth Proportional to 1,334.75, 1,841.81 and 775.15

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Solution

The fourth proportional to 1,334.75, 1,841.81 and 775.15 is: 1,069.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,334.75 : 1,841.81 = 775.15 : x
  2. Step 2: Convert to fraction form
    1,334.75/1,841.81 = 775.15/x
  3. Step 3: Cross multiply
    1,334.75x = 1,841.81 × 775.15
  4. Step 4: Simplify right side
    1,334.75x = 1,427,670.54
  5. Step 5: Solve for x
    x = 1,427,670.54/1,334.75
  6. Step 6: Final answer
    x = 1,069.62

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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.