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Finding the Fourth Proportional to 281,003.40, 421,505.10 and 162,613.80

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Solution

The fourth proportional to 281,003.40, 421,505.10 and 162,613.80 is: 243,920.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,003.40 : 421,505.10 = 162,613.80 : x
  2. Step 2: Convert to fraction form
    281,003.40/421,505.10 = 162,613.80/x
  3. Step 3: Cross multiply
    281,003.40x = 421,505.10 × 162,613.80
  4. Step 4: Simplify right side
    281,003.40x = 68,542,546,030.38
  5. Step 5: Solve for x
    x = 68,542,546,030.38/281,003.40
  6. Step 6: Final answer
    x = 243,920.70

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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.