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Finding the Fourth Proportional to 491,363.32, 678,073.44 and 276,503.26

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Solution

The fourth proportional to 491,363.32, 678,073.44 and 276,503.26 is: 381,570.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,363.32 : 678,073.44 = 276,503.26 : x
  2. Step 2: Convert to fraction form
    491,363.32/678,073.44 = 276,503.26/x
  3. Step 3: Cross multiply
    491,363.32x = 678,073.44 × 276,503.26
  4. Step 4: Simplify right side
    491,363.32x = 187,489,516,679.41
  5. Step 5: Solve for x
    x = 187,489,516,679.41/491,363.32
  6. Step 6: Final answer
    x = 381,570.03

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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.