Home / 1,210,272.80-1,819,345.80-857,728.40

Finding the Fourth Proportional to 1,210,272.80, 1,819,345.80 and 857,728.40

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Solution

The fourth proportional to 1,210,272.80, 1,819,345.80 and 857,728.40 is: 1,289,382.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210,272.80 : 1,819,345.80 = 857,728.40 : x
  2. Step 2: Convert to fraction form
    1,210,272.80/1,819,345.80 = 857,728.40/x
  3. Step 3: Cross multiply
    1,210,272.80x = 1,819,345.80 × 857,728.40
  4. Step 4: Simplify right side
    1,210,272.80x = 1,560,504,562,080.72
  5. Step 5: Solve for x
    x = 1,560,504,562,080.72/1,210,272.80
  6. Step 6: Final answer
    x = 1,289,382.49

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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.