Home / 1,211,129.40-1,816,256.70-611,891.40

Finding the Fourth Proportional to 1,211,129.40, 1,816,256.70 and 611,891.40

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Solution

The fourth proportional to 1,211,129.40, 1,816,256.70 and 611,891.40 is: 917,616.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,211,129.40 : 1,816,256.70 = 611,891.40 : x
  2. Step 2: Convert to fraction form
    1,211,129.40/1,816,256.70 = 611,891.40/x
  3. Step 3: Cross multiply
    1,211,129.40x = 1,816,256.70 × 611,891.40
  4. Step 4: Simplify right side
    1,211,129.40x = 1,111,351,854,922.38
  5. Step 5: Solve for x
    x = 1,111,351,854,922.38/1,211,129.40
  6. Step 6: Final answer
    x = 917,616.12

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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.