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Finding the Fourth Proportional to 492.90, 738.62 and 309.84

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Solution

The fourth proportional to 492.90, 738.62 and 309.84 is: 464.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    492.90 : 738.62 = 309.84 : x
  2. Step 2: Convert to fraction form
    492.90/738.62 = 309.84/x
  3. Step 3: Cross multiply
    492.90x = 738.62 × 309.84
  4. Step 4: Simplify right side
    492.90x = 228,854.02
  5. Step 5: Solve for x
    x = 228,854.02/492.90
  6. Step 6: Final answer
    x = 464.30

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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.