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Finding the Fourth Proportional to 314.18, 433.06 and 251.90

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Solution

The fourth proportional to 314.18, 433.06 and 251.90 is: 347.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.18 : 433.06 = 251.90 : x
  2. Step 2: Convert to fraction form
    314.18/433.06 = 251.90/x
  3. Step 3: Cross multiply
    314.18x = 433.06 × 251.90
  4. Step 4: Simplify right side
    314.18x = 109,087.81
  5. Step 5: Solve for x
    x = 109,087.81/314.18
  6. Step 6: Final answer
    x = 347.21

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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.