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Finding the Fourth Proportional to 321.16, 442.86 and 247.32

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Solution

The fourth proportional to 321.16, 442.86 and 247.32 is: 341.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    321.16 : 442.86 = 247.32 : x
  2. Step 2: Convert to fraction form
    321.16/442.86 = 247.32/x
  3. Step 3: Cross multiply
    321.16x = 442.86 × 247.32
  4. Step 4: Simplify right side
    321.16x = 109,528.14
  5. Step 5: Solve for x
    x = 109,528.14/321.16
  6. Step 6: Final answer
    x = 341.04

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