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Finding the Fourth Proportional to 330,816.80, 495,982.20 and 131,038.40

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Solution

The fourth proportional to 330,816.80, 495,982.20 and 131,038.40 is: 196,461.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,816.80 : 495,982.20 = 131,038.40 : x
  2. Step 2: Convert to fraction form
    330,816.80/495,982.20 = 131,038.40/x
  3. Step 3: Cross multiply
    330,816.80x = 495,982.20 × 131,038.40
  4. Step 4: Simplify right side
    330,816.80x = 64,992,713,916.48
  5. Step 5: Solve for x
    x = 64,992,713,916.48/330,816.80
  6. Step 6: Final answer
    x = 196,461.35

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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.