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Finding the Fourth Proportional to 405.26, 608.48 and 251.84

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Solution

The fourth proportional to 405.26, 608.48 and 251.84 is: 378.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.26 : 608.48 = 251.84 : x
  2. Step 2: Convert to fraction form
    405.26/608.48 = 251.84/x
  3. Step 3: Cross multiply
    405.26x = 608.48 × 251.84
  4. Step 4: Simplify right side
    405.26x = 153,239.60
  5. Step 5: Solve for x
    x = 153,239.60/405.26
  6. Step 6: Final answer
    x = 378.13

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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.