Home / 839,960.80-1,261,253.40-485,666.80

Finding the Fourth Proportional to 839,960.80, 1,261,253.40 and 485,666.80

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Solution

The fourth proportional to 839,960.80, 1,261,253.40 and 485,666.80 is: 729,258.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    839,960.80 : 1,261,253.40 = 485,666.80 : x
  2. Step 2: Convert to fraction form
    839,960.80/1,261,253.40 = 485,666.80/x
  3. Step 3: Cross multiply
    839,960.80x = 1,261,253.40 × 485,666.80
  4. Step 4: Simplify right side
    839,960.80x = 612,548,902,767.12
  5. Step 5: Solve for x
    x = 612,548,902,767.12/839,960.80
  6. Step 6: Final answer
    x = 729,258.92

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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.