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Finding the Fourth Proportional to 502.44, 692.34 and 389.74

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Solution

The fourth proportional to 502.44, 692.34 and 389.74 is: 537.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    502.44 : 692.34 = 389.74 : x
  2. Step 2: Convert to fraction form
    502.44/692.34 = 389.74/x
  3. Step 3: Cross multiply
    502.44x = 692.34 × 389.74
  4. Step 4: Simplify right side
    502.44x = 269,832.59
  5. Step 5: Solve for x
    x = 269,832.59/502.44
  6. Step 6: Final answer
    x = 537.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.