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Finding the Fourth Proportional to 348.47, 522.09 and 310.81

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Solution

The fourth proportional to 348.47, 522.09 and 310.81 is: 465.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.47 : 522.09 = 310.81 : x
  2. Step 2: Convert to fraction form
    348.47/522.09 = 310.81/x
  3. Step 3: Cross multiply
    348.47x = 522.09 × 310.81
  4. Step 4: Simplify right side
    348.47x = 162,270.79
  5. Step 5: Solve for x
    x = 162,270.79/348.47
  6. Step 6: Final answer
    x = 465.67

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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.