Home / 870,986.60-1,201,961.51-489,021.58

Finding the Fourth Proportional to 870,986.60, 1,201,961.51 and 489,021.58

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Solution

The fourth proportional to 870,986.60, 1,201,961.51 and 489,021.58 is: 674,849.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,986.60 : 1,201,961.51 = 489,021.58 : x
  2. Step 2: Convert to fraction form
    870,986.60/1,201,961.51 = 489,021.58/x
  3. Step 3: Cross multiply
    870,986.60x = 1,201,961.51 × 489,021.58
  4. Step 4: Simplify right side
    870,986.60x = 587,785,121,678.79
  5. Step 5: Solve for x
    x = 587,785,121,678.79/870,986.60
  6. Step 6: Final answer
    x = 674,849.79

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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.