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Finding the Fourth Proportional to 354.90, 531.74 and 192.70

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Solution

The fourth proportional to 354.90, 531.74 and 192.70 is: 288.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    354.90 : 531.74 = 192.70 : x
  2. Step 2: Convert to fraction form
    354.90/531.74 = 192.70/x
  3. Step 3: Cross multiply
    354.90x = 531.74 × 192.70
  4. Step 4: Simplify right side
    354.90x = 102,466.30
  5. Step 5: Solve for x
    x = 102,466.30/354.90
  6. Step 6: Final answer
    x = 288.72

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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.