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Finding the Fourth Proportional to 684.94, 1,027.55 and 338.26

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Solution

The fourth proportional to 684.94, 1,027.55 and 338.26 is: 507.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    684.94 : 1,027.55 = 338.26 : x
  2. Step 2: Convert to fraction form
    684.94/1,027.55 = 338.26/x
  3. Step 3: Cross multiply
    684.94x = 1,027.55 × 338.26
  4. Step 4: Simplify right side
    684.94x = 347,579.06
  5. Step 5: Solve for x
    x = 347,579.06/684.94
  6. Step 6: Final answer
    x = 507.46

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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.