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Finding the Fourth Proportional to 279,890.99, 386,234.99 and 159,015.50

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Solution

The fourth proportional to 279,890.99, 386,234.99 and 159,015.50 is: 219,433.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,890.99 : 386,234.99 = 159,015.50 : x
  2. Step 2: Convert to fraction form
    279,890.99/386,234.99 = 159,015.50/x
  3. Step 3: Cross multiply
    279,890.99x = 386,234.99 × 159,015.50
  4. Step 4: Simplify right side
    279,890.99x = 61,417,350,449.88
  5. Step 5: Solve for x
    x = 61,417,350,449.88/279,890.99
  6. Step 6: Final answer
    x = 219,433.11

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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.