Home / 870,986.79-1,201,961.77-489,021.77

Finding the Fourth Proportional to 870,986.79, 1,201,961.77 and 489,021.77

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Solution

The fourth proportional to 870,986.79, 1,201,961.77 and 489,021.77 is: 674,850.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,986.79 : 1,201,961.77 = 489,021.77 : x
  2. Step 2: Convert to fraction form
    870,986.79/1,201,961.77 = 489,021.77/x
  3. Step 3: Cross multiply
    870,986.79x = 1,201,961.77 × 489,021.77
  4. Step 4: Simplify right side
    870,986.79x = 587,785,474,937.00
  5. Step 5: Solve for x
    x = 587,785,474,937.00/870,986.79
  6. Step 6: Final answer
    x = 674,850.05

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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.