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Finding the Fourth Proportional to 1,235.82, 1,703.92 and 940.58

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Solution

The fourth proportional to 1,235.82, 1,703.92 and 940.58 is: 1,296.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,235.82 : 1,703.92 = 940.58 : x
  2. Step 2: Convert to fraction form
    1,235.82/1,703.92 = 940.58/x
  3. Step 3: Cross multiply
    1,235.82x = 1,703.92 × 940.58
  4. Step 4: Simplify right side
    1,235.82x = 1,602,673.07
  5. Step 5: Solve for x
    x = 1,602,673.07/1,235.82
  6. Step 6: Final answer
    x = 1,296.85

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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.