Home / 811,636.44-1,120,416.96-485,064.64

Finding the Fourth Proportional to 811,636.44, 1,120,416.96 and 485,064.64

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Solution

The fourth proportional to 811,636.44, 1,120,416.96 and 485,064.64 is: 669,603.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,636.44 : 1,120,416.96 = 485,064.64 : x
  2. Step 2: Convert to fraction form
    811,636.44/1,120,416.96 = 485,064.64/x
  3. Step 3: Cross multiply
    811,636.44x = 1,120,416.96 × 485,064.64
  4. Step 4: Simplify right side
    811,636.44x = 543,474,649,352.29
  5. Step 5: Solve for x
    x = 543,474,649,352.29/811,636.44
  6. Step 6: Final answer
    x = 669,603.56

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.