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Finding the Fourth Proportional to 524.67, 786.39 and 342.21

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Solution

The fourth proportional to 524.67, 786.39 and 342.21 is: 512.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    524.67 : 786.39 = 342.21 : x
  2. Step 2: Convert to fraction form
    524.67/786.39 = 342.21/x
  3. Step 3: Cross multiply
    524.67x = 786.39 × 342.21
  4. Step 4: Simplify right side
    524.67x = 269,110.52
  5. Step 5: Solve for x
    x = 269,110.52/524.67
  6. Step 6: Final answer
    x = 512.91

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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.