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Finding the Fourth Proportional to 684.15, 1,026.28 and 197.21

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Solution

The fourth proportional to 684.15, 1,026.28 and 197.21 is: 295.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.15 : 1,026.28 = 197.21 : x
  2. Step 2: Convert to fraction form
    684.15/1,026.28 = 197.21/x
  3. Step 3: Cross multiply
    684.15x = 1,026.28 × 197.21
  4. Step 4: Simplify right side
    684.15x = 202,386.56
  5. Step 5: Solve for x
    x = 202,386.56/684.15
  6. Step 6: Final answer
    x = 295.82

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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.