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Finding the Fourth Proportional to 4,818.40, 7,211.40 and 3,360.40

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Solution

The fourth proportional to 4,818.40, 7,211.40 and 3,360.40 is: 5,029.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,818.40 : 7,211.40 = 3,360.40 : x
  2. Step 2: Convert to fraction form
    4,818.40/7,211.40 = 3,360.40/x
  3. Step 3: Cross multiply
    4,818.40x = 7,211.40 × 3,360.40
  4. Step 4: Simplify right side
    4,818.40x = 24,233,188.56
  5. Step 5: Solve for x
    x = 24,233,188.56/4,818.40
  6. Step 6: Final answer
    x = 5,029.30

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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.