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Finding the Fourth Proportional to 348.61, 522.51 and 131.98

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Solution

The fourth proportional to 348.61, 522.51 and 131.98 is: 197.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.61 : 522.51 = 131.98 : x
  2. Step 2: Convert to fraction form
    348.61/522.51 = 131.98/x
  3. Step 3: Cross multiply
    348.61x = 522.51 × 131.98
  4. Step 4: Simplify right side
    348.61x = 68,960.87
  5. Step 5: Solve for x
    x = 68,960.87/348.61
  6. Step 6: Final answer
    x = 197.82

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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.