Home / 1,280,830.20-1,921,245.30-394,366.20

Finding the Fourth Proportional to 1,280,830.20, 1,921,245.30 and 394,366.20

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Solution

The fourth proportional to 1,280,830.20, 1,921,245.30 and 394,366.20 is: 591,549.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,830.20 : 1,921,245.30 = 394,366.20 : x
  2. Step 2: Convert to fraction form
    1,280,830.20/1,921,245.30 = 394,366.20/x
  3. Step 3: Cross multiply
    1,280,830.20x = 1,921,245.30 × 394,366.20
  4. Step 4: Simplify right side
    1,280,830.20x = 757,674,208,228.86
  5. Step 5: Solve for x
    x = 757,674,208,228.86/1,280,830.20
  6. Step 6: Final answer
    x = 591,549.30

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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.