Home / 879,168.78-1,318,738.77-280,121.81

Finding the Fourth Proportional to 879,168.78, 1,318,738.77 and 280,121.81

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Solution

The fourth proportional to 879,168.78, 1,318,738.77 and 280,121.81 is: 420,178.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,168.78 : 1,318,738.77 = 280,121.81 : x
  2. Step 2: Convert to fraction form
    879,168.78/1,318,738.77 = 280,121.81/x
  3. Step 3: Cross multiply
    879,168.78x = 1,318,738.77 × 280,121.81
  4. Step 4: Simplify right side
    879,168.78x = 369,407,484,575.88
  5. Step 5: Solve for x
    x = 369,407,484,575.88/879,168.78
  6. Step 6: Final answer
    x = 420,178.12

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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.