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Finding the Fourth Proportional to 492,485.80, 738,728.70 and 489,375.40

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Solution

The fourth proportional to 492,485.80, 738,728.70 and 489,375.40 is: 734,063.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,485.80 : 738,728.70 = 489,375.40 : x
  2. Step 2: Convert to fraction form
    492,485.80/738,728.70 = 489,375.40/x
  3. Step 3: Cross multiply
    492,485.80x = 738,728.70 × 489,375.40
  4. Step 4: Simplify right side
    492,485.80x = 361,515,653,053.98
  5. Step 5: Solve for x
    x = 361,515,653,053.98/492,485.80
  6. Step 6: Final answer
    x = 734,063.10

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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.