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Finding the Fourth Proportional to 381,321.48, 526,223.81 and 211,555.61

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Solution

The fourth proportional to 381,321.48, 526,223.81 and 211,555.61 is: 291,946.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,321.48 : 526,223.81 = 211,555.61 : x
  2. Step 2: Convert to fraction form
    381,321.48/526,223.81 = 211,555.61/x
  3. Step 3: Cross multiply
    381,321.48x = 526,223.81 × 211,555.61
  4. Step 4: Simplify right side
    381,321.48x = 111,325,595,432.18
  5. Step 5: Solve for x
    x = 111,325,595,432.18/381,321.48
  6. Step 6: Final answer
    x = 291,946.83

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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.