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Finding the Fourth Proportional to 398,423.40, 597,975.30 and 161,935.80

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Solution

The fourth proportional to 398,423.40, 597,975.30 and 161,935.80 is: 243,041.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,423.40 : 597,975.30 = 161,935.80 : x
  2. Step 2: Convert to fraction form
    398,423.40/597,975.30 = 161,935.80/x
  3. Step 3: Cross multiply
    398,423.40x = 597,975.30 × 161,935.80
  4. Step 4: Simplify right side
    398,423.40x = 96,833,608,585.74
  5. Step 5: Solve for x
    x = 96,833,608,585.74/398,423.40
  6. Step 6: Final answer
    x = 243,041.97

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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.