Home / 355,020.06-489,990.96-209,819.86

Finding the Fourth Proportional to 355,020.06, 489,990.96 and 209,819.86

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Solution

The fourth proportional to 355,020.06, 489,990.96 and 209,819.86 is: 289,588.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,020.06 : 489,990.96 = 209,819.86 : x
  2. Step 2: Convert to fraction form
    355,020.06/489,990.96 = 209,819.86/x
  3. Step 3: Cross multiply
    355,020.06x = 489,990.96 × 209,819.86
  4. Step 4: Simplify right side
    355,020.06x = 102,809,834,628.47
  5. Step 5: Solve for x
    x = 102,809,834,628.47/355,020.06
  6. Step 6: Final answer
    x = 289,588.80

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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.