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Finding the Fourth Proportional to 348.74, 522.72 and 143.20

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Solution

The fourth proportional to 348.74, 522.72 and 143.20 is: 214.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.74 : 522.72 = 143.20 : x
  2. Step 2: Convert to fraction form
    348.74/522.72 = 143.20/x
  3. Step 3: Cross multiply
    348.74x = 522.72 × 143.20
  4. Step 4: Simplify right side
    348.74x = 74,853.50
  5. Step 5: Solve for x
    x = 74,853.50/348.74
  6. Step 6: Final answer
    x = 214.64

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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.