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Finding the Fourth Proportional to 491,315.56, 678,011.06 and 276,451.32

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Solution

The fourth proportional to 491,315.56, 678,011.06 and 276,451.32 is: 381,500.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,315.56 : 678,011.06 = 276,451.32 : x
  2. Step 2: Convert to fraction form
    491,315.56/678,011.06 = 276,451.32/x
  3. Step 3: Cross multiply
    491,315.56x = 678,011.06 × 276,451.32
  4. Step 4: Simplify right side
    491,315.56x = 187,437,052,511.60
  5. Step 5: Solve for x
    x = 187,437,052,511.60/491,315.56
  6. Step 6: Final answer
    x = 381,500.34

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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.