Home / 426,832.20-640,280.70-127,289.40

Finding the Fourth Proportional to 426,832.20, 640,280.70 and 127,289.40

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Solution

The fourth proportional to 426,832.20, 640,280.70 and 127,289.40 is: 190,943.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,832.20 : 640,280.70 = 127,289.40 : x
  2. Step 2: Convert to fraction form
    426,832.20/640,280.70 = 127,289.40/x
  3. Step 3: Cross multiply
    426,832.20x = 640,280.70 × 127,289.40
  4. Step 4: Simplify right side
    426,832.20x = 81,500,946,134.58
  5. Step 5: Solve for x
    x = 81,500,946,134.58/426,832.20
  6. Step 6: Final answer
    x = 190,943.76

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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.