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Finding the Fourth Proportional to 352.76, 486 and 309.02

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Solution

The fourth proportional to 352.76, 486 and 309.02 is: 425.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    352.76 : 486 = 309.02 : x
  2. Step 2: Convert to fraction form
    352.76/486 = 309.02/x
  3. Step 3: Cross multiply
    352.76x = 486 × 309.02
  4. Step 4: Simplify right side
    352.76x = 150,181.29
  5. Step 5: Solve for x
    x = 150,181.29/352.76
  6. Step 6: Final answer
    x = 425.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.