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Finding the Fourth Proportional to 626.75, 864.84 and 346.99

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Solution

The fourth proportional to 626.75, 864.84 and 346.99 is: 478.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.75 : 864.84 = 346.99 : x
  2. Step 2: Convert to fraction form
    626.75/864.84 = 346.99/x
  3. Step 3: Cross multiply
    626.75x = 864.84 × 346.99
  4. Step 4: Simplify right side
    626.75x = 300,084.77
  5. Step 5: Solve for x
    x = 300,084.77/626.75
  6. Step 6: Final answer
    x = 478.80

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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.