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Finding the Fourth Proportional to 330,181.20, 495,271.80 and 216,019.80

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Solution

The fourth proportional to 330,181.20, 495,271.80 and 216,019.80 is: 324,029.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,181.20 : 495,271.80 = 216,019.80 : x
  2. Step 2: Convert to fraction form
    330,181.20/495,271.80 = 216,019.80/x
  3. Step 3: Cross multiply
    330,181.20x = 495,271.80 × 216,019.80
  4. Step 4: Simplify right side
    330,181.20x = 106,988,515,181.64
  5. Step 5: Solve for x
    x = 106,988,515,181.64/330,181.20
  6. Step 6: Final answer
    x = 324,029.70

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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.