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Finding the Fourth Proportional to 1,663.54, 2,295.79 and 955.61

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Solution

The fourth proportional to 1,663.54, 2,295.79 and 955.61 is: 1,318.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,663.54 : 2,295.79 = 955.61 : x
  2. Step 2: Convert to fraction form
    1,663.54/2,295.79 = 955.61/x
  3. Step 3: Cross multiply
    1,663.54x = 2,295.79 × 955.61
  4. Step 4: Simplify right side
    1,663.54x = 2,193,883.23
  5. Step 5: Solve for x
    x = 2,193,883.23/1,663.54
  6. Step 6: Final answer
    x = 1,318.81

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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.