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Finding the Fourth Proportional to 367,921.80, 551,445.30 and 330,305.40

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Solution

The fourth proportional to 367,921.80, 551,445.30 and 330,305.40 is: 495,065.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    367,921.80 : 551,445.30 = 330,305.40 : x
  2. Step 2: Convert to fraction form
    367,921.80/551,445.30 = 330,305.40/x
  3. Step 3: Cross multiply
    367,921.80x = 551,445.30 × 330,305.40
  4. Step 4: Simplify right side
    367,921.80x = 182,145,360,394.62
  5. Step 5: Solve for x
    x = 182,145,360,394.62/367,921.80
  6. Step 6: Final answer
    x = 495,065.42

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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.