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Finding the Fourth Proportional to 330,818.80, 495,985.20 and 131,040.40

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Solution

The fourth proportional to 330,818.80, 495,985.20 and 131,040.40 is: 196,464.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,818.80 : 495,985.20 = 131,040.40 : x
  2. Step 2: Convert to fraction form
    330,818.80/495,985.20 = 131,040.40/x
  3. Step 3: Cross multiply
    330,818.80x = 495,985.20 × 131,040.40
  4. Step 4: Simplify right side
    330,818.80x = 64,994,099,002.08
  5. Step 5: Solve for x
    x = 64,994,099,002.08/330,818.80
  6. Step 6: Final answer
    x = 196,464.35

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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.