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Finding the Fourth Proportional to 281,443.20, 421,243.20 and 218,774.40

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Solution

The fourth proportional to 281,443.20, 421,243.20 and 218,774.40 is: 327,445.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,443.20 : 421,243.20 = 218,774.40 : x
  2. Step 2: Convert to fraction form
    281,443.20/421,243.20 = 218,774.40/x
  3. Step 3: Cross multiply
    281,443.20x = 421,243.20 × 218,774.40
  4. Step 4: Simplify right side
    281,443.20x = 92,157,228,334.08
  5. Step 5: Solve for x
    x = 92,157,228,334.08/281,443.20
  6. Step 6: Final answer
    x = 327,445.21

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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.