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Finding the Fourth Proportional to 381,840.75, 526,940.24 and 212,090.67

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Solution

The fourth proportional to 381,840.75, 526,940.24 and 212,090.67 is: 292,685.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,840.75 : 526,940.24 = 212,090.67 : x
  2. Step 2: Convert to fraction form
    381,840.75/526,940.24 = 212,090.67/x
  3. Step 3: Cross multiply
    381,840.75x = 526,940.24 × 212,090.67
  4. Step 4: Simplify right side
    381,840.75x = 111,759,107,491.11
  5. Step 5: Solve for x
    x = 111,759,107,491.11/381,840.75
  6. Step 6: Final answer
    x = 292,685.12

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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.