Home / 426,738.57-639,967.14-142,350.75

Finding the Fourth Proportional to 426,738.57, 639,967.14 and 142,350.75

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Solution

The fourth proportional to 426,738.57, 639,967.14 and 142,350.75 is: 213,479.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,738.57 : 639,967.14 = 142,350.75 : x
  2. Step 2: Convert to fraction form
    426,738.57/639,967.14 = 142,350.75/x
  3. Step 3: Cross multiply
    426,738.57x = 639,967.14 × 142,350.75
  4. Step 4: Simplify right side
    426,738.57x = 91,099,802,354.36
  5. Step 5: Solve for x
    x = 91,099,802,354.36/426,738.57
  6. Step 6: Final answer
    x = 213,479.19

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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.