Home / 426,218.69-639,433.74-126,698.72

Finding the Fourth Proportional to 426,218.69, 639,433.74 and 126,698.72

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Solution

The fourth proportional to 426,218.69, 639,433.74 and 126,698.72 is: 190,079.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,218.69 : 639,433.74 = 126,698.72 : x
  2. Step 2: Convert to fraction form
    426,218.69/639,433.74 = 126,698.72/x
  3. Step 3: Cross multiply
    426,218.69x = 639,433.74 × 126,698.72
  4. Step 4: Simplify right side
    426,218.69x = 81,015,433,660.76
  5. Step 5: Solve for x
    x = 81,015,433,660.76/426,218.69
  6. Step 6: Final answer
    x = 190,079.49

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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.