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Finding the Fourth Proportional to 279,948.40, 419,922.60 and 190,718.80

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Solution

The fourth proportional to 279,948.40, 419,922.60 and 190,718.80 is: 286,078.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,948.40 : 419,922.60 = 190,718.80 : x
  2. Step 2: Convert to fraction form
    279,948.40/419,922.60 = 190,718.80/x
  3. Step 3: Cross multiply
    279,948.40x = 419,922.60 × 190,718.80
  4. Step 4: Simplify right side
    279,948.40x = 80,087,134,364.88
  5. Step 5: Solve for x
    x = 80,087,134,364.88/279,948.40
  6. Step 6: Final answer
    x = 286,078.20

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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.