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Finding the Fourth Proportional to 405.36, 608.17 and 199.94

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Solution

The fourth proportional to 405.36, 608.17 and 199.94 is: 299.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.36 : 608.17 = 199.94 : x
  2. Step 2: Convert to fraction form
    405.36/608.17 = 199.94/x
  3. Step 3: Cross multiply
    405.36x = 608.17 × 199.94
  4. Step 4: Simplify right side
    405.36x = 121,598.53
  5. Step 5: Solve for x
    x = 121,598.53/405.36
  6. Step 6: Final answer
    x = 299.98

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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.