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Finding the Fourth Proportional to 1,268.59, 1,901.48 and 829.66

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Solution

The fourth proportional to 1,268.59, 1,901.48 and 829.66 is: 1,243.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,268.59 : 1,901.48 = 829.66 : x
  2. Step 2: Convert to fraction form
    1,268.59/1,901.48 = 829.66/x
  3. Step 3: Cross multiply
    1,268.59x = 1,901.48 × 829.66
  4. Step 4: Simplify right side
    1,268.59x = 1,577,572.39
  5. Step 5: Solve for x
    x = 1,577,572.39/1,268.59
  6. Step 6: Final answer
    x = 1,243.57

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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.