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Finding the Fourth Proportional to 1,890,072, 2,835,108 and 489,240

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Solution

The fourth proportional to 1,890,072, 2,835,108 and 489,240 is: 733,860

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,890,072 : 2,835,108 = 489,240 : x
  2. Step 2: Convert to fraction form
    1,890,072/2,835,108 = 489,240/x
  3. Step 3: Cross multiply
    1,890,072x = 2,835,108 × 489,240
  4. Step 4: Simplify right side
    1,890,072x = 1,387,048,237,920
  5. Step 5: Solve for x
    x = 1,387,048,237,920/1,890,072
  6. Step 6: Final answer
    x = 733,860

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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.