Home / 1,320,010.80-1,980,016.20-478,453.20

Finding the Fourth Proportional to 1,320,010.80, 1,980,016.20 and 478,453.20

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Solution

The fourth proportional to 1,320,010.80, 1,980,016.20 and 478,453.20 is: 717,679.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,010.80 : 1,980,016.20 = 478,453.20 : x
  2. Step 2: Convert to fraction form
    1,320,010.80/1,980,016.20 = 478,453.20/x
  3. Step 3: Cross multiply
    1,320,010.80x = 1,980,016.20 × 478,453.20
  4. Step 4: Simplify right side
    1,320,010.80x = 947,345,086,941.84
  5. Step 5: Solve for x
    x = 947,345,086,941.84/1,320,010.80
  6. Step 6: Final answer
    x = 717,679.80

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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.