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Finding the Fourth Proportional to 329,182.70, 493,478.40 and 129,639.20

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Solution

The fourth proportional to 329,182.70, 493,478.40 and 129,639.20 is: 194,342.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,182.70 : 493,478.40 = 129,639.20 : x
  2. Step 2: Convert to fraction form
    329,182.70/493,478.40 = 129,639.20/x
  3. Step 3: Cross multiply
    329,182.70x = 493,478.40 × 129,639.20
  4. Step 4: Simplify right side
    329,182.70x = 63,974,144,993.28
  5. Step 5: Solve for x
    x = 63,974,144,993.28/329,182.70
  6. Step 6: Final answer
    x = 194,342.37

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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.