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Finding the Fourth Proportional to 418.08, 625.74 and 403.50

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Solution

The fourth proportional to 418.08, 625.74 and 403.50 is: 603.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.08 : 625.74 = 403.50 : x
  2. Step 2: Convert to fraction form
    418.08/625.74 = 403.50/x
  3. Step 3: Cross multiply
    418.08x = 625.74 × 403.50
  4. Step 4: Simplify right side
    418.08x = 252,486.09
  5. Step 5: Solve for x
    x = 252,486.09/418.08
  6. Step 6: Final answer
    x = 603.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.