Home / 879,378.54-1,319,163.39-280,198.86

Finding the Fourth Proportional to 879,378.54, 1,319,163.39 and 280,198.86

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Solution

The fourth proportional to 879,378.54, 1,319,163.39 and 280,198.86 is: 420,328.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,378.54 : 1,319,163.39 = 280,198.86 : x
  2. Step 2: Convert to fraction form
    879,378.54/1,319,163.39 = 280,198.86/x
  3. Step 3: Cross multiply
    879,378.54x = 1,319,163.39 × 280,198.86
  4. Step 4: Simplify right side
    879,378.54x = 369,628,078,031.74
  5. Step 5: Solve for x
    x = 369,628,078,031.74/879,378.54
  6. Step 6: Final answer
    x = 420,328.74

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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.