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Finding the Fourth Proportional to 381,811.40, 572,571.30 and 115,483.40

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Solution

The fourth proportional to 381,811.40, 572,571.30 and 115,483.40 is: 173,181.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,811.40 : 572,571.30 = 115,483.40 : x
  2. Step 2: Convert to fraction form
    381,811.40/572,571.30 = 115,483.40/x
  3. Step 3: Cross multiply
    381,811.40x = 572,571.30 × 115,483.40
  4. Step 4: Simplify right side
    381,811.40x = 66,122,480,466.42
  5. Step 5: Solve for x
    x = 66,122,480,466.42/381,811.40
  6. Step 6: Final answer
    x = 173,181.00

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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.