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Finding the Fourth Proportional to 491,378.36, 678,099.92 and 276,522.03

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Solution

The fourth proportional to 491,378.36, 678,099.92 and 276,522.03 is: 381,599.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,378.36 : 678,099.92 = 276,522.03 : x
  2. Step 2: Convert to fraction form
    491,378.36/678,099.92 = 276,522.03/x
  3. Step 3: Cross multiply
    491,378.36x = 678,099.92 × 276,522.03
  4. Step 4: Simplify right side
    491,378.36x = 187,509,565,038.63
  5. Step 5: Solve for x
    x = 187,509,565,038.63/491,378.36
  6. Step 6: Final answer
    x = 381,599.15

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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.