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Finding the Fourth Proportional to 684.95, 1,027.12 and 338.06

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Solution

The fourth proportional to 684.95, 1,027.12 and 338.06 is: 506.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.95 : 1,027.12 = 338.06 : x
  2. Step 2: Convert to fraction form
    684.95/1,027.12 = 338.06/x
  3. Step 3: Cross multiply
    684.95x = 1,027.12 × 338.06
  4. Step 4: Simplify right side
    684.95x = 347,228.19
  5. Step 5: Solve for x
    x = 347,228.19/684.95
  6. Step 6: Final answer
    x = 506.94

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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.