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Finding the Fourth Proportional to 1,265.93, 1,747.19 and 935.31

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Solution

The fourth proportional to 1,265.93, 1,747.19 and 935.31 is: 1,290.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,265.93 : 1,747.19 = 935.31 : x
  2. Step 2: Convert to fraction form
    1,265.93/1,747.19 = 935.31/x
  3. Step 3: Cross multiply
    1,265.93x = 1,747.19 × 935.31
  4. Step 4: Simplify right side
    1,265.93x = 1,634,166.62
  5. Step 5: Solve for x
    x = 1,634,166.62/1,265.93
  6. Step 6: Final answer
    x = 1,290.89

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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.