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Finding the Fourth Proportional to 281,108.70, 421,663.05 and 186,630.30

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Solution

The fourth proportional to 281,108.70, 421,663.05 and 186,630.30 is: 279,945.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,108.70 : 421,663.05 = 186,630.30 : x
  2. Step 2: Convert to fraction form
    281,108.70/421,663.05 = 186,630.30/x
  3. Step 3: Cross multiply
    281,108.70x = 421,663.05 × 186,630.30
  4. Step 4: Simplify right side
    281,108.70x = 78,695,101,520.42
  5. Step 5: Solve for x
    x = 78,695,101,520.42/281,108.70
  6. Step 6: Final answer
    x = 279,945.45

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Similar ratio
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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.