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Finding the Fourth Proportional to 418.04, 575.87 and 355.67

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Solution

The fourth proportional to 418.04, 575.87 and 355.67 is: 489.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.04 : 575.87 = 355.67 : x
  2. Step 2: Convert to fraction form
    418.04/575.87 = 355.67/x
  3. Step 3: Cross multiply
    418.04x = 575.87 × 355.67
  4. Step 4: Simplify right side
    418.04x = 204,817.90
  5. Step 5: Solve for x
    x = 204,817.90/418.04
  6. Step 6: Final answer
    x = 489.95

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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.