Home / 426,492,405.20-639,738,607.80-278,539,230.80

Finding the Fourth Proportional to 426,492,405.20, 639,738,607.80 and 278,539,230.80

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Solution

The fourth proportional to 426,492,405.20, 639,738,607.80 and 278,539,230.80 is: 417,808,846.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,492,405.20 : 639,738,607.80 = 278,539,230.80 : x
  2. Step 2: Convert to fraction form
    426,492,405.20/639,738,607.80 = 278,539,230.80/x
  3. Step 3: Cross multiply
    426,492,405.20x = 639,738,607.80 × 278,539,230.80
  4. Step 4: Simplify right side
    426,492,405.20x = 178,192,299,729,674,880
  5. Step 5: Solve for x
    x = 178,192,299,729,674,880/426,492,405.20
  6. Step 6: Final answer
    x = 417,808,846.20

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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.