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Finding the Fourth Proportional to 626.69, 864.81 and 346.91

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Solution

The fourth proportional to 626.69, 864.81 and 346.91 is: 478.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.69 : 864.81 = 346.91 : x
  2. Step 2: Convert to fraction form
    626.69/864.81 = 346.91/x
  3. Step 3: Cross multiply
    626.69x = 864.81 × 346.91
  4. Step 4: Simplify right side
    626.69x = 300,013.40
  5. Step 5: Solve for x
    x = 300,013.40/626.69
  6. Step 6: Final answer
    x = 478.73

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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.