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Finding the Fourth Proportional to 281,191.60, 421,787.40 and 259,540.30

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Solution

The fourth proportional to 281,191.60, 421,787.40 and 259,540.30 is: 389,310.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,191.60 : 421,787.40 = 259,540.30 : x
  2. Step 2: Convert to fraction form
    281,191.60/421,787.40 = 259,540.30/x
  3. Step 3: Cross multiply
    281,191.60x = 421,787.40 × 259,540.30
  4. Step 4: Simplify right side
    281,191.60x = 109,470,828,332.22
  5. Step 5: Solve for x
    x = 109,470,828,332.22/281,191.60
  6. Step 6: Final answer
    x = 389,310.45

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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.