Home / 639,513.76-959,365.41-212,910.25

Finding the Fourth Proportional to 639,513.76, 959,365.41 and 212,910.25

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Solution

The fourth proportional to 639,513.76, 959,365.41 and 212,910.25 is: 319,396.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,513.76 : 959,365.41 = 212,910.25 : x
  2. Step 2: Convert to fraction form
    639,513.76/959,365.41 = 212,910.25/x
  3. Step 3: Cross multiply
    639,513.76x = 959,365.41 × 212,910.25
  4. Step 4: Simplify right side
    639,513.76x = 204,258,729,284.45
  5. Step 5: Solve for x
    x = 204,258,729,284.45/639,513.76
  6. Step 6: Final answer
    x = 319,396.93

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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.