Home / 811,284.32-1,215,063.18-405,230.18

Finding the Fourth Proportional to 811,284.32, 1,215,063.18 and 405,230.18

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Solution

The fourth proportional to 811,284.32, 1,215,063.18 and 405,230.18 is: 606,914.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,284.32 : 1,215,063.18 = 405,230.18 : x
  2. Step 2: Convert to fraction form
    811,284.32/1,215,063.18 = 405,230.18/x
  3. Step 3: Cross multiply
    811,284.32x = 1,215,063.18 × 405,230.18
  4. Step 4: Simplify right side
    811,284.32x = 492,380,271,142.77
  5. Step 5: Solve for x
    x = 492,380,271,142.77/811,284.32
  6. Step 6: Final answer
    x = 606,914.57

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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.