Home / 641,990.72-963,173.57-286,921.71

Finding the Fourth Proportional to 641,990.72, 963,173.57 and 286,921.71

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Solution

The fourth proportional to 641,990.72, 963,173.57 and 286,921.71 is: 430,466.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,990.72 : 963,173.57 = 286,921.71 : x
  2. Step 2: Convert to fraction form
    641,990.72/963,173.57 = 286,921.71/x
  3. Step 3: Cross multiply
    641,990.72x = 963,173.57 × 286,921.71
  4. Step 4: Simplify right side
    641,990.72x = 276,355,407,731.21
  5. Step 5: Solve for x
    x = 276,355,407,731.21/641,990.72
  6. Step 6: Final answer
    x = 430,466.36

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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.