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Finding the Fourth Proportional to 524.42, 786.69 and 280.61

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Solution

The fourth proportional to 524.42, 786.69 and 280.61 is: 420.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.42 : 786.69 = 280.61 : x
  2. Step 2: Convert to fraction form
    524.42/786.69 = 280.61/x
  3. Step 3: Cross multiply
    524.42x = 786.69 × 280.61
  4. Step 4: Simplify right side
    524.42x = 220,749.15
  5. Step 5: Solve for x
    x = 220,749.15/524.42
  6. Step 6: Final answer
    x = 420.94

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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.