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Finding the Fourth Proportional to 392,912.40, 589,627.80 and 143,594.40

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Solution

The fourth proportional to 392,912.40, 589,627.80 and 143,594.40 is: 215,486.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,912.40 : 589,627.80 = 143,594.40 : x
  2. Step 2: Convert to fraction form
    392,912.40/589,627.80 = 143,594.40/x
  3. Step 3: Cross multiply
    392,912.40x = 589,627.80 × 143,594.40
  4. Step 4: Simplify right side
    392,912.40x = 84,667,250,164.32
  5. Step 5: Solve for x
    x = 84,667,250,164.32/392,912.40
  6. Step 6: Final answer
    x = 215,486.33

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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.