Home / 309,186.45-426,689.57-173,221.54

Finding the Fourth Proportional to 309,186.45, 426,689.57 and 173,221.54

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Solution

The fourth proportional to 309,186.45, 426,689.57 and 173,221.54 is: 239,052.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,186.45 : 426,689.57 = 173,221.54 : x
  2. Step 2: Convert to fraction form
    309,186.45/426,689.57 = 173,221.54/x
  3. Step 3: Cross multiply
    309,186.45x = 426,689.57 × 173,221.54
  4. Step 4: Simplify right side
    309,186.45x = 73,911,823,783.67
  5. Step 5: Solve for x
    x = 73,911,823,783.67/309,186.45
  6. Step 6: Final answer
    x = 239,052.60

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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.