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Finding the Fourth Proportional to 492.60, 738.78 and 272.98

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Solution

The fourth proportional to 492.60, 738.78 and 272.98 is: 409.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.60 : 738.78 = 272.98 : x
  2. Step 2: Convert to fraction form
    492.60/738.78 = 272.98/x
  3. Step 3: Cross multiply
    492.60x = 738.78 × 272.98
  4. Step 4: Simplify right side
    492.60x = 201,672.16
  5. Step 5: Solve for x
    x = 201,672.16/492.60
  6. Step 6: Final answer
    x = 409.40

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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.