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Finding the Fourth Proportional to 392,680.40, 589,263.60 and 155,998.40

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Solution

The fourth proportional to 392,680.40, 589,263.60 and 155,998.40 is: 234,094.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,680.40 : 589,263.60 = 155,998.40 : x
  2. Step 2: Convert to fraction form
    392,680.40/589,263.60 = 155,998.40/x
  3. Step 3: Cross multiply
    392,680.40x = 589,263.60 × 155,998.40
  4. Step 4: Simplify right side
    392,680.40x = 91,924,178,778.24
  5. Step 5: Solve for x
    x = 91,924,178,778.24/392,680.40
  6. Step 6: Final answer
    x = 234,094.14

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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.