Home / 811,938.60-1,217,907.90-251,029.80

Finding the Fourth Proportional to 811,938.60, 1,217,907.90 and 251,029.80

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Solution

The fourth proportional to 811,938.60, 1,217,907.90 and 251,029.80 is: 376,544.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,938.60 : 1,217,907.90 = 251,029.80 : x
  2. Step 2: Convert to fraction form
    811,938.60/1,217,907.90 = 251,029.80/x
  3. Step 3: Cross multiply
    811,938.60x = 1,217,907.90 × 251,029.80
  4. Step 4: Simplify right side
    811,938.60x = 305,731,176,555.42
  5. Step 5: Solve for x
    x = 305,731,176,555.42/811,938.60
  6. Step 6: Final answer
    x = 376,544.70

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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.