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Finding the Fourth Proportional to 492.64, 738.26 and 389.48

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Solution

The fourth proportional to 492.64, 738.26 and 389.48 is: 583.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.64 : 738.26 = 389.48 : x
  2. Step 2: Convert to fraction form
    492.64/738.26 = 389.48/x
  3. Step 3: Cross multiply
    492.64x = 738.26 × 389.48
  4. Step 4: Simplify right side
    492.64x = 287,537.50
  5. Step 5: Solve for x
    x = 287,537.50/492.64
  6. Step 6: Final answer
    x = 583.67

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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.