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Finding the Fourth Proportional to 329,000.40, 493,630.20 and 129,286.80

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Solution

The fourth proportional to 329,000.40, 493,630.20 and 129,286.80 is: 193,981.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,000.40 : 493,630.20 = 129,286.80 : x
  2. Step 2: Convert to fraction form
    329,000.40/493,630.20 = 129,286.80/x
  3. Step 3: Cross multiply
    329,000.40x = 493,630.20 × 129,286.80
  4. Step 4: Simplify right side
    329,000.40x = 63,819,868,941.36
  5. Step 5: Solve for x
    x = 63,819,868,941.36/329,000.40
  6. Step 6: Final answer
    x = 193,981.13

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1.5x scale

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.