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Finding the Fourth Proportional to 426,318.80, 639,823.80 and 412,494.80

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Solution

The fourth proportional to 426,318.80, 639,823.80 and 412,494.80 is: 619,076.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,318.80 : 639,823.80 = 412,494.80 : x
  2. Step 2: Convert to fraction form
    426,318.80/639,823.80 = 412,494.80/x
  3. Step 3: Cross multiply
    426,318.80x = 639,823.80 × 412,494.80
  4. Step 4: Simplify right side
    426,318.80x = 263,923,990,416.24
  5. Step 5: Solve for x
    x = 263,923,990,416.24/426,318.80
  6. Step 6: Final answer
    x = 619,076.59

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1.5x scale

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.