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Finding the Fourth Proportional to 329,181.70, 493,476.90 and 129,638.20

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Solution

The fourth proportional to 329,181.70, 493,476.90 and 129,638.20 is: 194,340.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,181.70 : 493,476.90 = 129,638.20 : x
  2. Step 2: Convert to fraction form
    329,181.70/493,476.90 = 129,638.20/x
  3. Step 3: Cross multiply
    329,181.70x = 493,476.90 × 129,638.20
  4. Step 4: Simplify right side
    329,181.70x = 63,973,457,057.58
  5. Step 5: Solve for x
    x = 63,973,457,057.58/329,181.70
  6. Step 6: Final answer
    x = 194,340.87

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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.