Home / 1,289,348.80-1,778,750.22-805,584.40

Finding the Fourth Proportional to 1,289,348.80, 1,778,750.22 and 805,584.40

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Solution

The fourth proportional to 1,289,348.80, 1,778,750.22 and 805,584.40 is: 1,111,362.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,289,348.80 : 1,778,750.22 = 805,584.40 : x
  2. Step 2: Convert to fraction form
    1,289,348.80/1,778,750.22 = 805,584.40/x
  3. Step 3: Cross multiply
    1,289,348.80x = 1,778,750.22 × 805,584.40
  4. Step 4: Simplify right side
    1,289,348.80x = 1,432,933,428,728.57
  5. Step 5: Solve for x
    x = 1,432,933,428,728.57/1,289,348.80
  6. Step 6: Final answer
    x = 1,111,362.13

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.