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Finding the Fourth Proportional to 667,008.88, 999,755.16 and 311,956.72

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Solution

The fourth proportional to 667,008.88, 999,755.16 and 311,956.72 is: 467,580.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,008.88 : 999,755.16 = 311,956.72 : x
  2. Step 2: Convert to fraction form
    667,008.88/999,755.16 = 311,956.72/x
  3. Step 3: Cross multiply
    667,008.88x = 999,755.16 × 311,956.72
  4. Step 4: Simplify right side
    667,008.88x = 311,880,340,516.68
  5. Step 5: Solve for x
    x = 311,880,340,516.68/667,008.88
  6. Step 6: Final answer
    x = 467,580.49

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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.