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Finding the Fourth Proportional to 624.37, 861.08 and 403.09

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Solution

The fourth proportional to 624.37, 861.08 and 403.09 is: 555.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    624.37 : 861.08 = 403.09 : x
  2. Step 2: Convert to fraction form
    624.37/861.08 = 403.09/x
  3. Step 3: Cross multiply
    624.37x = 861.08 × 403.09
  4. Step 4: Simplify right side
    624.37x = 347,091.34
  5. Step 5: Solve for x
    x = 347,091.34/624.37
  6. Step 6: Final answer
    x = 555.90

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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.