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Finding the Fourth Proportional to 624.25, 860.97 and 484.79

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Solution

The fourth proportional to 624.25, 860.97 and 484.79 is: 668.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.25 : 860.97 = 484.79 : x
  2. Step 2: Convert to fraction form
    624.25/860.97 = 484.79/x
  3. Step 3: Cross multiply
    624.25x = 860.97 × 484.79
  4. Step 4: Simplify right side
    624.25x = 417,389.65
  5. Step 5: Solve for x
    x = 417,389.65/624.25
  6. Step 6: Final answer
    x = 668.63

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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.