Home / 434,622.80-651,934.20-420,107.60

Finding the Fourth Proportional to 434,622.80, 651,934.20 and 420,107.60

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Solution

The fourth proportional to 434,622.80, 651,934.20 and 420,107.60 is: 630,161.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    434,622.80 : 651,934.20 = 420,107.60 : x
  2. Step 2: Convert to fraction form
    434,622.80/651,934.20 = 420,107.60/x
  3. Step 3: Cross multiply
    434,622.80x = 651,934.20 × 420,107.60
  4. Step 4: Simplify right side
    434,622.80x = 273,882,512,119.92
  5. Step 5: Solve for x
    x = 273,882,512,119.92/434,622.80
  6. Step 6: Final answer
    x = 630,161.40

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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.