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Finding the Fourth Proportional to 426,304.80, 639,802.80 and 412,480.80

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Solution

The fourth proportional to 426,304.80, 639,802.80 and 412,480.80 is: 619,055.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,304.80 : 639,802.80 = 412,480.80 : x
  2. Step 2: Convert to fraction form
    426,304.80/639,802.80 = 412,480.80/x
  3. Step 3: Cross multiply
    426,304.80x = 639,802.80 × 412,480.80
  4. Step 4: Simplify right side
    426,304.80x = 263,906,370,786.24
  5. Step 5: Solve for x
    x = 263,906,370,786.24/426,304.80
  6. Step 6: Final answer
    x = 619,055.59

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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.