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Finding the Fourth Proportional to 386,498.94, 579,213.81 and 279,025.98

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Solution

The fourth proportional to 386,498.94, 579,213.81 and 279,025.98 is: 418,153.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,498.94 : 579,213.81 = 279,025.98 : x
  2. Step 2: Convert to fraction form
    386,498.94/579,213.81 = 279,025.98/x
  3. Step 3: Cross multiply
    386,498.94x = 579,213.81 × 279,025.98
  4. Step 4: Simplify right side
    386,498.94x = 161,615,700,964.78
  5. Step 5: Solve for x
    x = 161,615,700,964.78/386,498.94
  6. Step 6: Final answer
    x = 418,153.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.