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Finding the Fourth Proportional to 355,665.65, 490,811.70 and 194,520.20

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Solution

The fourth proportional to 355,665.65, 490,811.70 and 194,520.20 is: 268,434.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,665.65 : 490,811.70 = 194,520.20 : x
  2. Step 2: Convert to fraction form
    355,665.65/490,811.70 = 194,520.20/x
  3. Step 3: Cross multiply
    355,665.65x = 490,811.70 × 194,520.20
  4. Step 4: Simplify right side
    355,665.65x = 95,472,790,046.34
  5. Step 5: Solve for x
    x = 95,472,790,046.34/355,665.65
  6. Step 6: Final answer
    x = 268,434.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.