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Finding the Fourth Proportional to 633,440.55, 874,234.92 and 388,381.96

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Solution

The fourth proportional to 633,440.55, 874,234.92 and 388,381.96 is: 536,020.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,440.55 : 874,234.92 = 388,381.96 : x
  2. Step 2: Convert to fraction form
    633,440.55/874,234.92 = 388,381.96/x
  3. Step 3: Cross multiply
    633,440.55x = 874,234.92 × 388,381.96
  4. Step 4: Simplify right side
    633,440.55x = 339,537,071,000.89
  5. Step 5: Solve for x
    x = 339,537,071,000.89/633,440.55
  6. Step 6: Final answer
    x = 536,020.42

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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.