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Finding the Fourth Proportional to 624.22, 860.98 and 403.26

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Solution

The fourth proportional to 624.22, 860.98 and 403.26 is: 556.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.22 : 860.98 = 403.26 : x
  2. Step 2: Convert to fraction form
    624.22/860.98 = 403.26/x
  3. Step 3: Cross multiply
    624.22x = 860.98 × 403.26
  4. Step 4: Simplify right side
    624.22x = 347,198.79
  5. Step 5: Solve for x
    x = 347,198.79/624.22
  6. Step 6: Final answer
    x = 556.21

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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.