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Finding the Fourth Proportional to 348.60, 522.70 and 143.32

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Solution

The fourth proportional to 348.60, 522.70 and 143.32 is: 214.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.60 : 522.70 = 143.32 : x
  2. Step 2: Convert to fraction form
    348.60/522.70 = 143.32/x
  3. Step 3: Cross multiply
    348.60x = 522.70 × 143.32
  4. Step 4: Simplify right side
    348.60x = 74,913.49
  5. Step 5: Solve for x
    x = 74,913.49/348.60
  6. Step 6: Final answer
    x = 214.90

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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.