Home / 1,261,123.09-1,891,984.93-408,194.90

Finding the Fourth Proportional to 1,261,123.09, 1,891,984.93 and 408,194.90

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Solution

The fourth proportional to 1,261,123.09, 1,891,984.93 and 408,194.90 is: 612,389.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261,123.09 : 1,891,984.93 = 408,194.90 : x
  2. Step 2: Convert to fraction form
    1,261,123.09/1,891,984.93 = 408,194.90/x
  3. Step 3: Cross multiply
    1,261,123.09x = 1,891,984.93 × 408,194.90
  4. Step 4: Simplify right side
    1,261,123.09x = 772,298,600,874.09
  5. Step 5: Solve for x
    x = 772,298,600,874.09/1,261,123.09
  6. Step 6: Final answer
    x = 612,389.55

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Double scale
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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.