Home / 1,028,999.80-1,543,499.70-319,099.60

Finding the Fourth Proportional to 1,028,999.80, 1,543,499.70 and 319,099.60

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Solution

The fourth proportional to 1,028,999.80, 1,543,499.70 and 319,099.60 is: 478,649.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028,999.80 : 1,543,499.70 = 319,099.60 : x
  2. Step 2: Convert to fraction form
    1,028,999.80/1,543,499.70 = 319,099.60/x
  3. Step 3: Cross multiply
    1,028,999.80x = 1,543,499.70 × 319,099.60
  4. Step 4: Simplify right side
    1,028,999.80x = 492,530,136,870.12
  5. Step 5: Solve for x
    x = 492,530,136,870.12/1,028,999.80
  6. Step 6: Final answer
    x = 478,649.40

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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.