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Finding the Fourth Proportional to 1,293.49, 1,784.26 and 939.00

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Solution

The fourth proportional to 1,293.49, 1,784.26 and 939.00 is: 1,295.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,293.49 : 1,784.26 = 939.00 : x
  2. Step 2: Convert to fraction form
    1,293.49/1,784.26 = 939.00/x
  3. Step 3: Cross multiply
    1,293.49x = 1,784.26 × 939.00
  4. Step 4: Simplify right side
    1,293.49x = 1,675,417.97
  5. Step 5: Solve for x
    x = 1,675,417.97/1,293.49
  6. Step 6: Final answer
    x = 1,295.27

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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.