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Finding the Fourth Proportional to 626.25, 864.21 and 342.67

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Solution

The fourth proportional to 626.25, 864.21 and 342.67 is: 472.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.25 : 864.21 = 342.67 : x
  2. Step 2: Convert to fraction form
    626.25/864.21 = 342.67/x
  3. Step 3: Cross multiply
    626.25x = 864.21 × 342.67
  4. Step 4: Simplify right side
    626.25x = 296,138.84
  5. Step 5: Solve for x
    x = 296,138.84/626.25
  6. Step 6: Final answer
    x = 472.88

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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.