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Finding the Fourth Proportional to 398,408.90, 597,953.55 and 161,921.30

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Solution

The fourth proportional to 398,408.90, 597,953.55 and 161,921.30 is: 243,020.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,408.90 : 597,953.55 = 161,921.30 : x
  2. Step 2: Convert to fraction form
    398,408.90/597,953.55 = 161,921.30/x
  3. Step 3: Cross multiply
    398,408.90x = 597,953.55 × 161,921.30
  4. Step 4: Simplify right side
    398,408.90x = 96,821,416,155.62
  5. Step 5: Solve for x
    x = 96,821,416,155.62/398,408.90
  6. Step 6: Final answer
    x = 243,020.21

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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.