Home / 839,969.70-1,259,954.55-279,004.20

Finding the Fourth Proportional to 839,969.70, 1,259,954.55 and 279,004.20

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Solution

The fourth proportional to 839,969.70, 1,259,954.55 and 279,004.20 is: 418,506.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,969.70 : 1,259,954.55 = 279,004.20 : x
  2. Step 2: Convert to fraction form
    839,969.70/1,259,954.55 = 279,004.20/x
  3. Step 3: Cross multiply
    839,969.70x = 1,259,954.55 × 279,004.20
  4. Step 4: Simplify right side
    839,969.70x = 351,532,611,259.11
  5. Step 5: Solve for x
    x = 351,532,611,259.11/839,969.70
  6. Step 6: Final answer
    x = 418,506.30

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Double scale
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Similar ratio
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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.