Home / 280,980.50-421,251.62-190,785.38

Finding the Fourth Proportional to 280,980.50, 421,251.62 and 190,785.38

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Solution

The fourth proportional to 280,980.50, 421,251.62 and 190,785.38 is: 286,029.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,980.50 : 421,251.62 = 190,785.38 : x
  2. Step 2: Convert to fraction form
    280,980.50/421,251.62 = 190,785.38/x
  3. Step 3: Cross multiply
    280,980.50x = 421,251.62 × 190,785.38
  4. Step 4: Simplify right side
    280,980.50x = 80,368,650,397.32
  5. Step 5: Solve for x
    x = 80,368,650,397.32/280,980.50
  6. Step 6: Final answer
    x = 286,029.28

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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.