Home / 1,209,143.56-1,668,583.69-665,279.71

Finding the Fourth Proportional to 1,209,143.56, 1,668,583.69 and 665,279.71

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Solution

The fourth proportional to 1,209,143.56, 1,668,583.69 and 665,279.71 is: 918,067.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,143.56 : 1,668,583.69 = 665,279.71 : x
  2. Step 2: Convert to fraction form
    1,209,143.56/1,668,583.69 = 665,279.71/x
  3. Step 3: Cross multiply
    1,209,143.56x = 1,668,583.69 × 665,279.71
  4. Step 4: Simplify right side
    1,209,143.56x = 1,110,074,873,393.93
  5. Step 5: Solve for x
    x = 1,110,074,873,393.93/1,209,143.56
  6. Step 6: Final answer
    x = 918,067.06

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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.