Home / 806,786.40-1,210,179.60-215,810.40

Finding the Fourth Proportional to 806,786.40, 1,210,179.60 and 215,810.40

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Solution

The fourth proportional to 806,786.40, 1,210,179.60 and 215,810.40 is: 323,715.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    806,786.40 : 1,210,179.60 = 215,810.40 : x
  2. Step 2: Convert to fraction form
    806,786.40/1,210,179.60 = 215,810.40/x
  3. Step 3: Cross multiply
    806,786.40x = 1,210,179.60 × 215,810.40
  4. Step 4: Simplify right side
    806,786.40x = 261,169,343,547.84
  5. Step 5: Solve for x
    x = 261,169,343,547.84/806,786.40
  6. Step 6: Final answer
    x = 323,715.60

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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.