Home / 426,739.07-639,967.89-142,351.25

Finding the Fourth Proportional to 426,739.07, 639,967.89 and 142,351.25

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Solution

The fourth proportional to 426,739.07, 639,967.89 and 142,351.25 is: 213,479.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,739.07 : 639,967.89 = 142,351.25 : x
  2. Step 2: Convert to fraction form
    426,739.07/639,967.89 = 142,351.25/x
  3. Step 3: Cross multiply
    426,739.07x = 639,967.89 × 142,351.25
  4. Step 4: Simplify right side
    426,739.07x = 91,100,229,101.36
  5. Step 5: Solve for x
    x = 91,100,229,101.36/426,739.07
  6. Step 6: Final answer
    x = 213,479.94

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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.