Home / 1,218,557.76-1,681,630.56-667,321.92

Finding the Fourth Proportional to 1,218,557.76, 1,681,630.56 and 667,321.92

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Solution

The fourth proportional to 1,218,557.76, 1,681,630.56 and 667,321.92 is: 920,915.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,557.76 : 1,681,630.56 = 667,321.92 : x
  2. Step 2: Convert to fraction form
    1,218,557.76/1,681,630.56 = 667,321.92/x
  3. Step 3: Cross multiply
    1,218,557.76x = 1,681,630.56 × 667,321.92
  4. Step 4: Simplify right side
    1,218,557.76x = 1,122,188,934,029.88
  5. Step 5: Solve for x
    x = 1,122,188,934,029.88/1,218,557.76
  6. Step 6: Final answer
    x = 920,915.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.