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Finding the Fourth Proportional to 667,478,527.92, 921,054,000.24 and 385,311,872.97

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Solution

The fourth proportional to 667,478,527.92, 921,054,000.24 and 385,311,872.97 is: 531,692,072.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,478,527.92 : 921,054,000.24 = 385,311,872.97 : x
  2. Step 2: Convert to fraction form
    667,478,527.92/921,054,000.24 = 385,311,872.97/x
  3. Step 3: Cross multiply
    667,478,527.92x = 921,054,000.24 × 385,311,872.97
  4. Step 4: Simplify right side
    667,478,527.92x = 354,893,041,938,985,280
  5. Step 5: Solve for x
    x = 354,893,041,938,985,280/667,478,527.92
  6. Step 6: Final answer
    x = 531,692,072.62

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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.