Home / 491,438.16-678,184.02-276,579.76

Finding the Fourth Proportional to 491,438.16, 678,184.02 and 276,579.76

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Solution

The fourth proportional to 491,438.16, 678,184.02 and 276,579.76 is: 381,679.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,438.16 : 678,184.02 = 276,579.76 : x
  2. Step 2: Convert to fraction form
    491,438.16/678,184.02 = 276,579.76/x
  3. Step 3: Cross multiply
    491,438.16x = 678,184.02 × 276,579.76
  4. Step 4: Simplify right side
    491,438.16x = 187,571,973,487.44
  5. Step 5: Solve for x
    x = 187,571,973,487.44/491,438.16
  6. Step 6: Final answer
    x = 381,679.71

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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.