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Finding the Fourth Proportional to 714.27, 1,071.53 and 220.67

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Solution

The fourth proportional to 714.27, 1,071.53 and 220.67 is: 331.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.27 : 1,071.53 = 220.67 : x
  2. Step 2: Convert to fraction form
    714.27/1,071.53 = 220.67/x
  3. Step 3: Cross multiply
    714.27x = 1,071.53 × 220.67
  4. Step 4: Simplify right side
    714.27x = 236,448.06
  5. Step 5: Solve for x
    x = 236,448.06/714.27
  6. Step 6: Final answer
    x = 331.03

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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.