Home / 691,276.38-1,036,914.70-217,998.78

Finding the Fourth Proportional to 691,276.38, 1,036,914.70 and 217,998.78

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Solution

The fourth proportional to 691,276.38, 1,036,914.70 and 217,998.78 is: 326,998.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,276.38 : 1,036,914.70 = 217,998.78 : x
  2. Step 2: Convert to fraction form
    691,276.38/1,036,914.70 = 217,998.78/x
  3. Step 3: Cross multiply
    691,276.38x = 1,036,914.70 × 217,998.78
  4. Step 4: Simplify right side
    691,276.38x = 226,046,139,564.07
  5. Step 5: Solve for x
    x = 226,046,139,564.07/691,276.38
  6. Step 6: Final answer
    x = 326,998.21

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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.