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Finding the Fourth Proportional to 398,614.79, 597,919.64 and 145,912.88

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Solution

The fourth proportional to 398,614.79, 597,919.64 and 145,912.88 is: 218,868.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,614.79 : 597,919.64 = 145,912.88 : x
  2. Step 2: Convert to fraction form
    398,614.79/597,919.64 = 145,912.88/x
  3. Step 3: Cross multiply
    398,614.79x = 597,919.64 × 145,912.88
  4. Step 4: Simplify right side
    398,614.79x = 87,244,174,056.15
  5. Step 5: Solve for x
    x = 87,244,174,056.15/398,614.79
  6. Step 6: Final answer
    x = 218,868.38

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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.