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Finding the Fourth Proportional to 281,881.40, 422,822.10 and 261,606.20

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Solution

The fourth proportional to 281,881.40, 422,822.10 and 261,606.20 is: 392,409.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,881.40 : 422,822.10 = 261,606.20 : x
  2. Step 2: Convert to fraction form
    281,881.40/422,822.10 = 261,606.20/x
  3. Step 3: Cross multiply
    281,881.40x = 422,822.10 × 261,606.20
  4. Step 4: Simplify right side
    281,881.40x = 110,612,882,857.02
  5. Step 5: Solve for x
    x = 110,612,882,857.02/281,881.40
  6. Step 6: Final answer
    x = 392,409.30

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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.