Home / 280,979.50-421,250.12-190,784.38

Finding the Fourth Proportional to 280,979.50, 421,250.12 and 190,784.38

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Solution

The fourth proportional to 280,979.50, 421,250.12 and 190,784.38 is: 286,027.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,979.50 : 421,250.12 = 190,784.38 : x
  2. Step 2: Convert to fraction form
    280,979.50/421,250.12 = 190,784.38/x
  3. Step 3: Cross multiply
    280,979.50x = 421,250.12 × 190,784.38
  4. Step 4: Simplify right side
    280,979.50x = 80,367,942,969.13
  5. Step 5: Solve for x
    x = 80,367,942,969.13/280,979.50
  6. Step 6: Final answer
    x = 286,027.78

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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.