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Finding the Fourth Proportional to 1,123.03, 1,684.32 and 382.56

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Solution

The fourth proportional to 1,123.03, 1,684.32 and 382.56 is: 573.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.03 : 1,684.32 = 382.56 : x
  2. Step 2: Convert to fraction form
    1,123.03/1,684.32 = 382.56/x
  3. Step 3: Cross multiply
    1,123.03x = 1,684.32 × 382.56
  4. Step 4: Simplify right side
    1,123.03x = 644,353.46
  5. Step 5: Solve for x
    x = 644,353.46/1,123.03
  6. Step 6: Final answer
    x = 573.76

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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.