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Finding the Fourth Proportional to 284.78, 427.26 and 156.50

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Solution

The fourth proportional to 284.78, 427.26 and 156.50 is: 234.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    284.78 : 427.26 = 156.50 : x
  2. Step 2: Convert to fraction form
    284.78/427.26 = 156.50/x
  3. Step 3: Cross multiply
    284.78x = 427.26 × 156.50
  4. Step 4: Simplify right side
    284.78x = 66,866.19
  5. Step 5: Solve for x
    x = 66,866.19/284.78
  6. Step 6: Final answer
    x = 234.80

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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.