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Finding the Fourth Proportional to 626.69, 864.80 and 346.92

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Solution

The fourth proportional to 626.69, 864.80 and 346.92 is: 478.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.69 : 864.80 = 346.92 : x
  2. Step 2: Convert to fraction form
    626.69/864.80 = 346.92/x
  3. Step 3: Cross multiply
    626.69x = 864.80 × 346.92
  4. Step 4: Simplify right side
    626.69x = 300,012.09
  5. Step 5: Solve for x
    x = 300,012.09/626.69
  6. Step 6: Final answer
    x = 478.72

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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.