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Finding the Fourth Proportional to 398,419.40, 597,969.30 and 161,931.80

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Solution

The fourth proportional to 398,419.40, 597,969.30 and 161,931.80 is: 243,035.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,419.40 : 597,969.30 = 161,931.80 : x
  2. Step 2: Convert to fraction form
    398,419.40/597,969.30 = 161,931.80/x
  3. Step 3: Cross multiply
    398,419.40x = 597,969.30 × 161,931.80
  4. Step 4: Simplify right side
    398,419.40x = 96,830,245,093.74
  5. Step 5: Solve for x
    x = 96,830,245,093.74/398,419.40
  6. Step 6: Final answer
    x = 243,035.97

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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.