Home / 840,010.20-1,260,015.30-485,716.20

Finding the Fourth Proportional to 840,010.20, 1,260,015.30 and 485,716.20

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Solution

The fourth proportional to 840,010.20, 1,260,015.30 and 485,716.20 is: 728,574.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    840,010.20 : 1,260,015.30 = 485,716.20 : x
  2. Step 2: Convert to fraction form
    840,010.20/1,260,015.30 = 485,716.20/x
  3. Step 3: Cross multiply
    840,010.20x = 1,260,015.30 × 485,716.20
  4. Step 4: Simplify right side
    840,010.20x = 612,009,843,457.86
  5. Step 5: Solve for x
    x = 612,009,843,457.86/840,010.20
  6. Step 6: Final answer
    x = 728,574.30

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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.