Home / 280,852.20-421,278.30-279,102.60

Finding the Fourth Proportional to 280,852.20, 421,278.30 and 279,102.60

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Solution

The fourth proportional to 280,852.20, 421,278.30 and 279,102.60 is: 418,653.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,852.20 : 421,278.30 = 279,102.60 : x
  2. Step 2: Convert to fraction form
    280,852.20/421,278.30 = 279,102.60/x
  3. Step 3: Cross multiply
    280,852.20x = 421,278.30 × 279,102.60
  4. Step 4: Simplify right side
    280,852.20x = 117,579,868,853.58
  5. Step 5: Solve for x
    x = 117,579,868,853.58/280,852.20
  6. Step 6: Final answer
    x = 418,653.90

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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.