Home / 4,919.52-7,378.80-1,409.40

Finding the Fourth Proportional to 4,919.52, 7,378.80 and 1,409.40

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Solution

The fourth proportional to 4,919.52, 7,378.80 and 1,409.40 is: 2,113.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,919.52 : 7,378.80 = 1,409.40 : x
  2. Step 2: Convert to fraction form
    4,919.52/7,378.80 = 1,409.40/x
  3. Step 3: Cross multiply
    4,919.52x = 7,378.80 × 1,409.40
  4. Step 4: Simplify right side
    4,919.52x = 10,399,680.72
  5. Step 5: Solve for x
    x = 10,399,680.72/4,919.52
  6. Step 6: Final answer
    x = 2,113.96

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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.