Home / 426,284.80-639,427.20-145,811.20

Finding the Fourth Proportional to 426,284.80, 639,427.20 and 145,811.20

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Solution

The fourth proportional to 426,284.80, 639,427.20 and 145,811.20 is: 218,716.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,284.80 : 639,427.20 = 145,811.20 : x
  2. Step 2: Convert to fraction form
    426,284.80/639,427.20 = 145,811.20/x
  3. Step 3: Cross multiply
    426,284.80x = 639,427.20 × 145,811.20
  4. Step 4: Simplify right side
    426,284.80x = 93,235,647,344.64
  5. Step 5: Solve for x
    x = 93,235,647,344.64/426,284.80
  6. Step 6: Final answer
    x = 218,716.80

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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.