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Finding the Fourth Proportional to 714.21, 1,071.54 and 471.21

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Solution

The fourth proportional to 714.21, 1,071.54 and 471.21 is: 706.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.21 : 1,071.54 = 471.21 : x
  2. Step 2: Convert to fraction form
    714.21/1,071.54 = 471.21/x
  3. Step 3: Cross multiply
    714.21x = 1,071.54 × 471.21
  4. Step 4: Simplify right side
    714.21x = 504,920.36
  5. Step 5: Solve for x
    x = 504,920.36/714.21
  6. Step 6: Final answer
    x = 706.96

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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.