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Finding the Fourth Proportional to 281,445.20, 421,246.20 and 218,776.40

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Solution

The fourth proportional to 281,445.20, 421,246.20 and 218,776.40 is: 327,448.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,445.20 : 421,246.20 = 218,776.40 : x
  2. Step 2: Convert to fraction form
    281,445.20/421,246.20 = 218,776.40/x
  3. Step 3: Cross multiply
    281,445.20x = 421,246.20 × 218,776.40
  4. Step 4: Simplify right side
    281,445.20x = 92,158,727,149.68
  5. Step 5: Solve for x
    x = 92,158,727,149.68/281,445.20
  6. Step 6: Final answer
    x = 327,448.21

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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.