Home / 287,019.78-396,142.12-190,052.70

Finding the Fourth Proportional to 287,019.78, 396,142.12 and 190,052.70

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Solution

The fourth proportional to 287,019.78, 396,142.12 and 190,052.70 is: 262,309.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,019.78 : 396,142.12 = 190,052.70 : x
  2. Step 2: Convert to fraction form
    287,019.78/396,142.12 = 190,052.70/x
  3. Step 3: Cross multiply
    287,019.78x = 396,142.12 × 190,052.70
  4. Step 4: Simplify right side
    287,019.78x = 75,287,879,489.72
  5. Step 5: Solve for x
    x = 75,287,879,489.72/287,019.78
  6. Step 6: Final answer
    x = 262,309.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.