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Finding the Fourth Proportional to 489,870.36, 676,020.60 and 275,010.81

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Solution

The fourth proportional to 489,870.36, 676,020.60 and 275,010.81 is: 379,514.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,870.36 : 676,020.60 = 275,010.81 : x
  2. Step 2: Convert to fraction form
    489,870.36/676,020.60 = 275,010.81/x
  3. Step 3: Cross multiply
    489,870.36x = 676,020.60 × 275,010.81
  4. Step 4: Simplify right side
    489,870.36x = 185,912,972,782.69
  5. Step 5: Solve for x
    x = 185,912,972,782.69/489,870.36
  6. Step 6: Final answer
    x = 379,514.64

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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.