Home / 309,981.16-427,975.74-189,192.48

Finding the Fourth Proportional to 309,981.16, 427,975.74 and 189,192.48

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Solution

The fourth proportional to 309,981.16, 427,975.74 and 189,192.48 is: 261,208.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,981.16 : 427,975.74 = 189,192.48 : x
  2. Step 2: Convert to fraction form
    309,981.16/427,975.74 = 189,192.48/x
  3. Step 3: Cross multiply
    309,981.16x = 427,975.74 × 189,192.48
  4. Step 4: Simplify right side
    309,981.16x = 80,969,790,025.53
  5. Step 5: Solve for x
    x = 80,969,790,025.53/309,981.16
  6. Step 6: Final answer
    x = 261,208.74

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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.