Home / 920,611.77-1,380,885-280,889.67

Finding the Fourth Proportional to 920,611.77, 1,380,885 and 280,889.67

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Solution

The fourth proportional to 920,611.77, 1,380,885 and 280,889.67 is: 421,324.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    920,611.77 : 1,380,885 = 280,889.67 : x
  2. Step 2: Convert to fraction form
    920,611.77/1,380,885 = 280,889.67/x
  3. Step 3: Cross multiply
    920,611.77x = 1,380,885 × 280,889.67
  4. Step 4: Simplify right side
    920,611.77x = 387,876,331,957.95
  5. Step 5: Solve for x
    x = 387,876,331,957.95/920,611.77
  6. Step 6: Final answer
    x = 421,324.54

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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.