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Finding the Fourth Proportional to 491,382.84, 678,056.13 and 276,519.41

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Solution

The fourth proportional to 491,382.84, 678,056.13 and 276,519.41 is: 381,567.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,382.84 : 678,056.13 = 276,519.41 : x
  2. Step 2: Convert to fraction form
    491,382.84/678,056.13 = 276,519.41/x
  3. Step 3: Cross multiply
    491,382.84x = 678,056.13 × 276,519.41
  4. Step 4: Simplify right side
    491,382.84x = 187,495,681,014.48
  5. Step 5: Solve for x
    x = 187,495,681,014.48/491,382.84
  6. Step 6: Final answer
    x = 381,567.42

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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.