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Finding the Fourth Proportional to 713.97, 1,071.06 and 220.28

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Solution

The fourth proportional to 713.97, 1,071.06 and 220.28 is: 330.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.97 : 1,071.06 = 220.28 : x
  2. Step 2: Convert to fraction form
    713.97/1,071.06 = 220.28/x
  3. Step 3: Cross multiply
    713.97x = 1,071.06 × 220.28
  4. Step 4: Simplify right side
    713.97x = 235,927.74
  5. Step 5: Solve for x
    x = 235,927.74/713.97
  6. Step 6: Final answer
    x = 330.44

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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.