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Finding the Fourth Proportional to 1,276.66, 1,914.81 and 352.28

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Solution

The fourth proportional to 1,276.66, 1,914.81 and 352.28 is: 528.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.66 : 1,914.81 = 352.28 : x
  2. Step 2: Convert to fraction form
    1,276.66/1,914.81 = 352.28/x
  3. Step 3: Cross multiply
    1,276.66x = 1,914.81 × 352.28
  4. Step 4: Simplify right side
    1,276.66x = 674,552.73
  5. Step 5: Solve for x
    x = 674,552.73/1,276.66
  6. Step 6: Final answer
    x = 528.37

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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.