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Finding the Fourth Proportional to 954.54, 1,318.37 and 639.27

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Solution

The fourth proportional to 954.54, 1,318.37 and 639.27 is: 882.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    954.54 : 1,318.37 = 639.27 : x
  2. Step 2: Convert to fraction form
    954.54/1,318.37 = 639.27/x
  3. Step 3: Cross multiply
    954.54x = 1,318.37 × 639.27
  4. Step 4: Simplify right side
    954.54x = 842,791.19
  5. Step 5: Solve for x
    x = 842,791.19/954.54
  6. Step 6: Final answer
    x = 882.93

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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.