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Finding the Fourth Proportional to 839.04, 1,258.56 and 717.36

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Solution

The fourth proportional to 839.04, 1,258.56 and 717.36 is: 1,076.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.04 : 1,258.56 = 717.36 : x
  2. Step 2: Convert to fraction form
    839.04/1,258.56 = 717.36/x
  3. Step 3: Cross multiply
    839.04x = 1,258.56 × 717.36
  4. Step 4: Simplify right side
    839.04x = 902,840.60
  5. Step 5: Solve for x
    x = 902,840.60/839.04
  6. Step 6: Final answer
    x = 1,076.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.