Home / 939,571.20-1,296,601.68-509,840.40

Finding the Fourth Proportional to 939,571.20, 1,296,601.68 and 509,840.40

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Solution

The fourth proportional to 939,571.20, 1,296,601.68 and 509,840.40 is: 703,576.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,571.20 : 1,296,601.68 = 509,840.40 : x
  2. Step 2: Convert to fraction form
    939,571.20/1,296,601.68 = 509,840.40/x
  3. Step 3: Cross multiply
    939,571.20x = 1,296,601.68 × 509,840.40
  4. Step 4: Simplify right side
    939,571.20x = 661,059,919,171.87
  5. Step 5: Solve for x
    x = 661,059,919,171.87/939,571.20
  6. Step 6: Final answer
    x = 703,576.18

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.