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Finding the Fourth Proportional to 314.58, 433.84 and 190.21

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Solution

The fourth proportional to 314.58, 433.84 and 190.21 is: 262.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.58 : 433.84 = 190.21 : x
  2. Step 2: Convert to fraction form
    314.58/433.84 = 190.21/x
  3. Step 3: Cross multiply
    314.58x = 433.84 × 190.21
  4. Step 4: Simplify right side
    314.58x = 82,520.71
  5. Step 5: Solve for x
    x = 82,520.71/314.58
  6. Step 6: Final answer
    x = 262.32

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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.