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Finding the Fourth Proportional to 279,890.94, 386,234.91 and 159,015.45

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Solution

The fourth proportional to 279,890.94, 386,234.91 and 159,015.45 is: 219,433.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,890.94 : 386,234.91 = 159,015.45 : x
  2. Step 2: Convert to fraction form
    279,890.94/386,234.91 = 159,015.45/x
  3. Step 3: Cross multiply
    279,890.94x = 386,234.91 × 159,015.45
  4. Step 4: Simplify right side
    279,890.94x = 61,417,316,432.50
  5. Step 5: Solve for x
    x = 61,417,316,432.50/279,890.94
  6. Step 6: Final answer
    x = 219,433.03

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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.