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Finding the Fourth Proportional to 894.23, 1,340.39 and 338.68

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Solution

The fourth proportional to 894.23, 1,340.39 and 338.68 is: 507.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    894.23 : 1,340.39 = 338.68 : x
  2. Step 2: Convert to fraction form
    894.23/1,340.39 = 338.68/x
  3. Step 3: Cross multiply
    894.23x = 1,340.39 × 338.68
  4. Step 4: Simplify right side
    894.23x = 453,965.57
  5. Step 5: Solve for x
    x = 453,965.57/894.23
  6. Step 6: Final answer
    x = 507.66

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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.