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Finding the Fourth Proportional to 1,203.47, 1,661.56 and 982.95

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Solution

The fourth proportional to 1,203.47, 1,661.56 and 982.95 is: 1,357.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,203.47 : 1,661.56 = 982.95 : x
  2. Step 2: Convert to fraction form
    1,203.47/1,661.56 = 982.95/x
  3. Step 3: Cross multiply
    1,203.47x = 1,661.56 × 982.95
  4. Step 4: Simplify right side
    1,203.47x = 1,633,227.94
  5. Step 5: Solve for x
    x = 1,633,227.94/1,203.47
  6. Step 6: Final answer
    x = 1,357.10

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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.