Home / 1,078,128.80-1,617,193.20-319,997.60

Finding the Fourth Proportional to 1,078,128.80, 1,617,193.20 and 319,997.60

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Solution

The fourth proportional to 1,078,128.80, 1,617,193.20 and 319,997.60 is: 479,996.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078,128.80 : 1,617,193.20 = 319,997.60 : x
  2. Step 2: Convert to fraction form
    1,078,128.80/1,617,193.20 = 319,997.60/x
  3. Step 3: Cross multiply
    1,078,128.80x = 1,617,193.20 × 319,997.60
  4. Step 4: Simplify right side
    1,078,128.80x = 517,497,942,736.32
  5. Step 5: Solve for x
    x = 517,497,942,736.32/1,078,128.80
  6. Step 6: Final answer
    x = 479,996.40

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Half scale
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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.