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Finding the Fourth Proportional to 642,706.44, 886,474.31 and 424,662.54

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Solution

The fourth proportional to 642,706.44, 886,474.31 and 424,662.54 is: 585,729.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,706.44 : 886,474.31 = 424,662.54 : x
  2. Step 2: Convert to fraction form
    642,706.44/886,474.31 = 424,662.54/x
  3. Step 3: Cross multiply
    642,706.44x = 886,474.31 × 424,662.54
  4. Step 4: Simplify right side
    642,706.44x = 376,452,430,006.04
  5. Step 5: Solve for x
    x = 376,452,430,006.04/642,706.44
  6. Step 6: Final answer
    x = 585,729.98

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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.