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Finding the Fourth Proportional to 684.45, 1,026.74 and 251.51

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Solution

The fourth proportional to 684.45, 1,026.74 and 251.51 is: 377.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.45 : 1,026.74 = 251.51 : x
  2. Step 2: Convert to fraction form
    684.45/1,026.74 = 251.51/x
  3. Step 3: Cross multiply
    684.45x = 1,026.74 × 251.51
  4. Step 4: Simplify right side
    684.45x = 258,230.87
  5. Step 5: Solve for x
    x = 258,230.87/684.45
  6. Step 6: Final answer
    x = 377.28

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.