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Finding the Fourth Proportional to 714.89, 1,072.34 and 201.89

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Solution

The fourth proportional to 714.89, 1,072.34 and 201.89 is: 302.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.89 : 1,072.34 = 201.89 : x
  2. Step 2: Convert to fraction form
    714.89/1,072.34 = 201.89/x
  3. Step 3: Cross multiply
    714.89x = 1,072.34 × 201.89
  4. Step 4: Simplify right side
    714.89x = 216,493.71
  5. Step 5: Solve for x
    x = 216,493.71/714.89
  6. Step 6: Final answer
    x = 302.84

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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.