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Finding the Fourth Proportional to 897,120.90, 1,238,056.72 and 489,245

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Solution

The fourth proportional to 897,120.90, 1,238,056.72 and 489,245 is: 675,174.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    897,120.90 : 1,238,056.72 = 489,245 : x
  2. Step 2: Convert to fraction form
    897,120.90/1,238,056.72 = 489,245/x
  3. Step 3: Cross multiply
    897,120.90x = 1,238,056.72 × 489,245
  4. Step 4: Simplify right side
    897,120.90x = 605,713,059,976.40
  5. Step 5: Solve for x
    x = 605,713,059,976.40/897,120.90
  6. Step 6: Final answer
    x = 675,174.39

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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.