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Finding the Fourth Proportional to 714.25, 985.96 and 517.72

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Solution

The fourth proportional to 714.25, 985.96 and 517.72 is: 714.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    714.25 : 985.96 = 517.72 : x
  2. Step 2: Convert to fraction form
    714.25/985.96 = 517.72/x
  3. Step 3: Cross multiply
    714.25x = 985.96 × 517.72
  4. Step 4: Simplify right side
    714.25x = 510,451.21
  5. Step 5: Solve for x
    x = 510,451.21/714.25
  6. Step 6: Final answer
    x = 714.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.