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Finding the Fourth Proportional to 330,561.50, 495,551.43 and 131,021.94

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Solution

The fourth proportional to 330,561.50, 495,551.43 and 131,021.94 is: 196,417.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,561.50 : 495,551.43 = 131,021.94 : x
  2. Step 2: Convert to fraction form
    330,561.50/495,551.43 = 131,021.94/x
  3. Step 3: Cross multiply
    330,561.50x = 495,551.43 × 131,021.94
  4. Step 4: Simplify right side
    330,561.50x = 64,928,109,728.37
  5. Step 5: Solve for x
    x = 64,928,109,728.37/330,561.50
  6. Step 6: Final answer
    x = 196,417.64

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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.