Home / 863,139.40-1,294,190.70-443,235.40

Finding the Fourth Proportional to 863,139.40, 1,294,190.70 and 443,235.40

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Solution

The fourth proportional to 863,139.40, 1,294,190.70 and 443,235.40 is: 664,586.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,139.40 : 1,294,190.70 = 443,235.40 : x
  2. Step 2: Convert to fraction form
    863,139.40/1,294,190.70 = 443,235.40/x
  3. Step 3: Cross multiply
    863,139.40x = 1,294,190.70 × 443,235.40
  4. Step 4: Simplify right side
    863,139.40x = 573,631,132,590.78
  5. Step 5: Solve for x
    x = 573,631,132,590.78/863,139.40
  6. Step 6: Final answer
    x = 664,586.89

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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.