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Finding the Fourth Proportional to 329,190.70, 493,490.40 and 129,647.20

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Solution

The fourth proportional to 329,190.70, 493,490.40 and 129,647.20 is: 194,354.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,190.70 : 493,490.40 = 129,647.20 : x
  2. Step 2: Convert to fraction form
    329,190.70/493,490.40 = 129,647.20/x
  3. Step 3: Cross multiply
    329,190.70x = 493,490.40 × 129,647.20
  4. Step 4: Simplify right side
    329,190.70x = 63,979,648,586.88
  5. Step 5: Solve for x
    x = 63,979,648,586.88/329,190.70
  6. Step 6: Final answer
    x = 194,354.36

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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.