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Finding the Fourth Proportional to 381,738.90, 572,462.55 and 115,410.90

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Solution

The fourth proportional to 381,738.90, 572,462.55 and 115,410.90 is: 173,072.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,738.90 : 572,462.55 = 115,410.90 : x
  2. Step 2: Convert to fraction form
    381,738.90/572,462.55 = 115,410.90/x
  3. Step 3: Cross multiply
    381,738.90x = 572,462.55 × 115,410.90
  4. Step 4: Simplify right side
    381,738.90x = 66,068,418,111.80
  5. Step 5: Solve for x
    x = 66,068,418,111.80/381,738.90
  6. Step 6: Final answer
    x = 173,072.27

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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.