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Finding the Fourth Proportional to 280.53, 420.81 and 234.96

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Solution

The fourth proportional to 280.53, 420.81 and 234.96 is: 352.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.53 : 420.81 = 234.96 : x
  2. Step 2: Convert to fraction form
    280.53/420.81 = 234.96/x
  3. Step 3: Cross multiply
    280.53x = 420.81 × 234.96
  4. Step 4: Simplify right side
    280.53x = 98,873.52
  5. Step 5: Solve for x
    x = 98,873.52/280.53
  6. Step 6: Final answer
    x = 352.45

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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.