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Finding the Fourth Proportional to 392,936, 589,404 and 143,618

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Solution

The fourth proportional to 392,936, 589,404 and 143,618 is: 215,427

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,936 : 589,404 = 143,618 : x
  2. Step 2: Convert to fraction form
    392,936/589,404 = 143,618/x
  3. Step 3: Cross multiply
    392,936x = 589,404 × 143,618
  4. Step 4: Simplify right side
    392,936x = 84,649,023,672
  5. Step 5: Solve for x
    x = 84,649,023,672/392,936
  6. Step 6: Final answer
    x = 215,427

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.