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Finding the Fourth Proportional to 490,611.35, 677,021.40 and 286,680.89

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Solution

The fourth proportional to 490,611.35, 677,021.40 and 286,680.89 is: 395,606.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,611.35 : 677,021.40 = 286,680.89 : x
  2. Step 2: Convert to fraction form
    490,611.35/677,021.40 = 286,680.89/x
  3. Step 3: Cross multiply
    490,611.35x = 677,021.40 × 286,680.89
  4. Step 4: Simplify right side
    490,611.35x = 194,089,094,115.94
  5. Step 5: Solve for x
    x = 194,089,094,115.94/490,611.35
  6. Step 6: Final answer
    x = 395,606.62

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.