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Finding the Fourth Proportional to 1,474.49, 2,211.74 and 378.86

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Solution

The fourth proportional to 1,474.49, 2,211.74 and 378.86 is: 568.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,474.49 : 2,211.74 = 378.86 : x
  2. Step 2: Convert to fraction form
    1,474.49/2,211.74 = 378.86/x
  3. Step 3: Cross multiply
    1,474.49x = 2,211.74 × 378.86
  4. Step 4: Simplify right side
    1,474.49x = 837,926.86
  5. Step 5: Solve for x
    x = 837,926.86/1,474.49
  6. Step 6: Final answer
    x = 568.28

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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.