Home / 421,427.60-631,258.20-196,979.60

Finding the Fourth Proportional to 421,427.60, 631,258.20 and 196,979.60

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Solution

The fourth proportional to 421,427.60, 631,258.20 and 196,979.60 is: 295,056.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,427.60 : 631,258.20 = 196,979.60 : x
  2. Step 2: Convert to fraction form
    421,427.60/631,258.20 = 196,979.60/x
  3. Step 3: Cross multiply
    421,427.60x = 631,258.20 × 196,979.60
  4. Step 4: Simplify right side
    421,427.60x = 124,344,987,732.72
  5. Step 5: Solve for x
    x = 124,344,987,732.72/421,427.60
  6. Step 6: Final answer
    x = 295,056.58

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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.