Home / 685,518.40-1,028,277.60-404,891.20

Finding the Fourth Proportional to 685,518.40, 1,028,277.60 and 404,891.20

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Solution

The fourth proportional to 685,518.40, 1,028,277.60 and 404,891.20 is: 607,336.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,518.40 : 1,028,277.60 = 404,891.20 : x
  2. Step 2: Convert to fraction form
    685,518.40/1,028,277.60 = 404,891.20/x
  3. Step 3: Cross multiply
    685,518.40x = 1,028,277.60 × 404,891.20
  4. Step 4: Simplify right side
    685,518.40x = 416,340,551,397.12
  5. Step 5: Solve for x
    x = 416,340,551,397.12/685,518.40
  6. Step 6: Final answer
    x = 607,336.80

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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.