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Finding the Fourth Proportional to 667,007.88, 999,753.66 and 311,955.72

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Solution

The fourth proportional to 667,007.88, 999,753.66 and 311,955.72 is: 467,578.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,007.88 : 999,753.66 = 311,955.72 : x
  2. Step 2: Convert to fraction form
    667,007.88/999,753.66 = 311,955.72/x
  3. Step 3: Cross multiply
    667,007.88x = 999,753.66 × 311,955.72
  4. Step 4: Simplify right side
    667,007.88x = 311,878,872,827.94
  5. Step 5: Solve for x
    x = 311,878,872,827.94/667,007.88
  6. Step 6: Final answer
    x = 467,578.99

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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.