Home / 399,228.80-597,968.40-212,021.60

Finding the Fourth Proportional to 399,228.80, 597,968.40 and 212,021.60

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Solution

The fourth proportional to 399,228.80, 597,968.40 and 212,021.60 is: 317,567.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,228.80 : 597,968.40 = 212,021.60 : x
  2. Step 2: Convert to fraction form
    399,228.80/597,968.40 = 212,021.60/x
  3. Step 3: Cross multiply
    399,228.80x = 597,968.40 × 212,021.60
  4. Step 4: Simplify right side
    399,228.80x = 126,782,216,917.44
  5. Step 5: Solve for x
    x = 126,782,216,917.44/399,228.80
  6. Step 6: Final answer
    x = 317,567.81

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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.