Home / 631,091.20-870,910.60-359,179.80

Finding the Fourth Proportional to 631,091.20, 870,910.60 and 359,179.80

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Solution

The fourth proportional to 631,091.20, 870,910.60 and 359,179.80 is: 495,670.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,091.20 : 870,910.60 = 359,179.80 : x
  2. Step 2: Convert to fraction form
    631,091.20/870,910.60 = 359,179.80/x
  3. Step 3: Cross multiply
    631,091.20x = 870,910.60 × 359,179.80
  4. Step 4: Simplify right side
    631,091.20x = 312,813,495,125.88
  5. Step 5: Solve for x
    x = 312,813,495,125.88/631,091.20
  6. Step 6: Final answer
    x = 495,670.82

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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.