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Finding the Fourth Proportional to 368.76, 553.21 and 307.74

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Solution

The fourth proportional to 368.76, 553.21 and 307.74 is: 461.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.76 : 553.21 = 307.74 : x
  2. Step 2: Convert to fraction form
    368.76/553.21 = 307.74/x
  3. Step 3: Cross multiply
    368.76x = 553.21 × 307.74
  4. Step 4: Simplify right side
    368.76x = 170,244.85
  5. Step 5: Solve for x
    x = 170,244.85/368.76
  6. Step 6: Final answer
    x = 461.67

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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.