Home / 426,228.30-639,688.05-412,404.30

Finding the Fourth Proportional to 426,228.30, 639,688.05 and 412,404.30

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Solution

The fourth proportional to 426,228.30, 639,688.05 and 412,404.30 is: 618,940.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,228.30 : 639,688.05 = 412,404.30 : x
  2. Step 2: Convert to fraction form
    426,228.30/639,688.05 = 412,404.30/x
  3. Step 3: Cross multiply
    426,228.30x = 639,688.05 × 412,404.30
  4. Step 4: Simplify right side
    426,228.30x = 263,810,102,478.62
  5. Step 5: Solve for x
    x = 263,810,102,478.62/426,228.30
  6. Step 6: Final answer
    x = 618,940.84

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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.