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Finding the Fourth Proportional to 548,638.80, 768,619.20 and 548,638.80

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Solution

The fourth proportional to 548,638.80, 768,619.20 and 548,638.80 is: 768,619.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,638.80 : 768,619.20 = 548,638.80 : x
  2. Step 2: Convert to fraction form
    548,638.80/768,619.20 = 548,638.80/x
  3. Step 3: Cross multiply
    548,638.80x = 768,619.20 × 548,638.80
  4. Step 4: Simplify right side
    548,638.80x = 421,694,315,544.96
  5. Step 5: Solve for x
    x = 421,694,315,544.96/548,638.80
  6. Step 6: Final answer
    x = 768,619.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.