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Finding the Fourth Proportional to 491,589.24, 678,385.62 and 276,728.64

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Solution

The fourth proportional to 491,589.24, 678,385.62 and 276,728.64 is: 381,881.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,589.24 : 678,385.62 = 276,728.64 : x
  2. Step 2: Convert to fraction form
    491,589.24/678,385.62 = 276,728.64/x
  3. Step 3: Cross multiply
    491,589.24x = 678,385.62 × 276,728.64
  4. Step 4: Simplify right side
    491,589.24x = 187,728,730,018.16
  5. Step 5: Solve for x
    x = 187,728,730,018.16/491,589.24
  6. Step 6: Final answer
    x = 381,881.28

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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.