Home / 870,990.96-1,201,936.55-489,033.84

Finding the Fourth Proportional to 870,990.96, 1,201,936.55 and 489,033.84

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Solution

The fourth proportional to 870,990.96, 1,201,936.55 and 489,033.84 is: 674,849.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,990.96 : 1,201,936.55 = 489,033.84 : x
  2. Step 2: Convert to fraction form
    870,990.96/1,201,936.55 = 489,033.84/x
  3. Step 3: Cross multiply
    870,990.96x = 1,201,936.55 × 489,033.84
  4. Step 4: Simplify right side
    870,990.96x = 587,787,644,037.68
  5. Step 5: Solve for x
    x = 587,787,644,037.68/870,990.96
  6. Step 6: Final answer
    x = 674,849.31

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1.5x scale

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.