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Finding the Fourth Proportional to 284.74, 427.21 and 239.58

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Solution

The fourth proportional to 284.74, 427.21 and 239.58 is: 359.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.74 : 427.21 = 239.58 : x
  2. Step 2: Convert to fraction form
    284.74/427.21 = 239.58/x
  3. Step 3: Cross multiply
    284.74x = 427.21 × 239.58
  4. Step 4: Simplify right side
    284.74x = 102,350.37
  5. Step 5: Solve for x
    x = 102,350.37/284.74
  6. Step 6: Final answer
    x = 359.46

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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.