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Finding the Fourth Proportional to 489,381.60, 734,072.40 and 312,234.60

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Solution

The fourth proportional to 489,381.60, 734,072.40 and 312,234.60 is: 468,351.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,381.60 : 734,072.40 = 312,234.60 : x
  2. Step 2: Convert to fraction form
    489,381.60/734,072.40 = 312,234.60/x
  3. Step 3: Cross multiply
    489,381.60x = 734,072.40 × 312,234.60
  4. Step 4: Simplify right side
    489,381.60x = 229,202,802,185.04
  5. Step 5: Solve for x
    x = 229,202,802,185.04/489,381.60
  6. Step 6: Final answer
    x = 468,351.90

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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.