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Finding the Fourth Proportional to 314.30, 433.58 and 189.87

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Solution

The fourth proportional to 314.30, 433.58 and 189.87 is: 261.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.30 : 433.58 = 189.87 : x
  2. Step 2: Convert to fraction form
    314.30/433.58 = 189.87/x
  3. Step 3: Cross multiply
    314.30x = 433.58 × 189.87
  4. Step 4: Simplify right side
    314.30x = 82,322.89
  5. Step 5: Solve for x
    x = 82,322.89/314.30
  6. Step 6: Final answer
    x = 261.93

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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.