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Finding the Fourth Proportional to 348.06, 522.06 and 128.67

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Solution

The fourth proportional to 348.06, 522.06 and 128.67 is: 192.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.06 : 522.06 = 128.67 : x
  2. Step 2: Convert to fraction form
    348.06/522.06 = 128.67/x
  3. Step 3: Cross multiply
    348.06x = 522.06 × 128.67
  4. Step 4: Simplify right side
    348.06x = 67,173.46
  5. Step 5: Solve for x
    x = 67,173.46/348.06
  6. Step 6: Final answer
    x = 192.99

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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.