Home / 680,139.20-1,020,208.80-206,823.80

Finding the Fourth Proportional to 680,139.20, 1,020,208.80 and 206,823.80

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Solution

The fourth proportional to 680,139.20, 1,020,208.80 and 206,823.80 is: 310,235.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,139.20 : 1,020,208.80 = 206,823.80 : x
  2. Step 2: Convert to fraction form
    680,139.20/1,020,208.80 = 206,823.80/x
  3. Step 3: Cross multiply
    680,139.20x = 1,020,208.80 × 206,823.80
  4. Step 4: Simplify right side
    680,139.20x = 211,003,460,809.44
  5. Step 5: Solve for x
    x = 211,003,460,809.44/680,139.20
  6. Step 6: Final answer
    x = 310,235.70

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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.