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Finding the Fourth Proportional to 281,212.60, 421,818.90 and 259,561.30

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Solution

The fourth proportional to 281,212.60, 421,818.90 and 259,561.30 is: 389,341.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,212.60 : 421,818.90 = 259,561.30 : x
  2. Step 2: Convert to fraction form
    281,212.60/421,818.90 = 259,561.30/x
  3. Step 3: Cross multiply
    281,212.60x = 421,818.90 × 259,561.30
  4. Step 4: Simplify right side
    281,212.60x = 109,487,862,048.57
  5. Step 5: Solve for x
    x = 109,487,862,048.57/281,212.60
  6. Step 6: Final answer
    x = 389,341.95

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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.