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Finding the Fourth Proportional to 1,276.34, 1,761.59 and 833.46

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Solution

The fourth proportional to 1,276.34, 1,761.59 and 833.46 is: 1,150.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.34 : 1,761.59 = 833.46 : x
  2. Step 2: Convert to fraction form
    1,276.34/1,761.59 = 833.46/x
  3. Step 3: Cross multiply
    1,276.34x = 1,761.59 × 833.46
  4. Step 4: Simplify right side
    1,276.34x = 1,468,210.63
  5. Step 5: Solve for x
    x = 1,468,210.63/1,276.34
  6. Step 6: Final answer
    x = 1,150.33

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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.