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Finding the Fourth Proportional to 426,860.70, 640,401.76 and 227,016.76

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Solution

The fourth proportional to 426,860.70, 640,401.76 and 227,016.76 is: 340,584.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,860.70 : 640,401.76 = 227,016.76 : x
  2. Step 2: Convert to fraction form
    426,860.70/640,401.76 = 227,016.76/x
  3. Step 3: Cross multiply
    426,860.70x = 640,401.76 × 227,016.76
  4. Step 4: Simplify right side
    426,860.70x = 145,381,932,653.50
  5. Step 5: Solve for x
    x = 145,381,932,653.50/426,860.70
  6. Step 6: Final answer
    x = 340,584.02

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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.