Home / 1,209,015.12-1,668,440.87-665,139.27

Finding the Fourth Proportional to 1,209,015.12, 1,668,440.87 and 665,139.27

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Solution

The fourth proportional to 1,209,015.12, 1,668,440.87 and 665,139.27 is: 917,892.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,015.12 : 1,668,440.87 = 665,139.27 : x
  2. Step 2: Convert to fraction form
    1,209,015.12/1,668,440.87 = 665,139.27/x
  3. Step 3: Cross multiply
    1,209,015.12x = 1,668,440.87 × 665,139.27
  4. Step 4: Simplify right side
    1,209,015.12x = 1,109,745,542,309.97
  5. Step 5: Solve for x
    x = 1,109,745,542,309.97/1,209,015.12
  6. Step 6: Final answer
    x = 917,892.20

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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.