Home / 685,640.80-1,028,461.20-180,200.80

Finding the Fourth Proportional to 685,640.80, 1,028,461.20 and 180,200.80

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Solution

The fourth proportional to 685,640.80, 1,028,461.20 and 180,200.80 is: 270,301.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,640.80 : 1,028,461.20 = 180,200.80 : x
  2. Step 2: Convert to fraction form
    685,640.80/1,028,461.20 = 180,200.80/x
  3. Step 3: Cross multiply
    685,640.80x = 1,028,461.20 × 180,200.80
  4. Step 4: Simplify right side
    685,640.80x = 185,329,531,008.96
  5. Step 5: Solve for x
    x = 185,329,531,008.96/685,640.80
  6. Step 6: Final answer
    x = 270,301.20

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Double scale
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Similar ratio
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1.5x scale

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.