Home / 839,915.20-1,259,872.80-485,621.20

Finding the Fourth Proportional to 839,915.20, 1,259,872.80 and 485,621.20

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Solution

The fourth proportional to 839,915.20, 1,259,872.80 and 485,621.20 is: 728,431.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,915.20 : 1,259,872.80 = 485,621.20 : x
  2. Step 2: Convert to fraction form
    839,915.20/1,259,872.80 = 485,621.20/x
  3. Step 3: Cross multiply
    839,915.20x = 1,259,872.80 × 485,621.20
  4. Step 4: Simplify right side
    839,915.20x = 611,820,940,983.36
  5. Step 5: Solve for x
    x = 611,820,940,983.36/839,915.20
  6. Step 6: Final answer
    x = 728,431.80

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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.