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Finding the Fourth Proportional to 348.40, 522.06 and 339.40

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Solution

The fourth proportional to 348.40, 522.06 and 339.40 is: 508.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.40 : 522.06 = 339.40 : x
  2. Step 2: Convert to fraction form
    348.40/522.06 = 339.40/x
  3. Step 3: Cross multiply
    348.40x = 522.06 × 339.40
  4. Step 4: Simplify right side
    348.40x = 177,187.16
  5. Step 5: Solve for x
    x = 177,187.16/348.40
  6. Step 6: Final answer
    x = 508.57

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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.