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Finding the Fourth Proportional to 281,119.20, 421,678.80 and 186,640.80

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Solution

The fourth proportional to 281,119.20, 421,678.80 and 186,640.80 is: 279,961.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,119.20 : 421,678.80 = 186,640.80 : x
  2. Step 2: Convert to fraction form
    281,119.20/421,678.80 = 186,640.80/x
  3. Step 3: Cross multiply
    281,119.20x = 421,678.80 × 186,640.80
  4. Step 4: Simplify right side
    281,119.20x = 78,702,468,575.04
  5. Step 5: Solve for x
    x = 78,702,468,575.04/281,119.20
  6. Step 6: Final answer
    x = 279,961.20

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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.