Home / 1,209,004.55-1,668,426.26-665,128.67

Finding the Fourth Proportional to 1,209,004.55, 1,668,426.26 and 665,128.67

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Solution

The fourth proportional to 1,209,004.55, 1,668,426.26 and 665,128.67 is: 917,877.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,004.55 : 1,668,426.26 = 665,128.67 : x
  2. Step 2: Convert to fraction form
    1,209,004.55/1,668,426.26 = 665,128.67/x
  3. Step 3: Cross multiply
    1,209,004.55x = 1,668,426.26 × 665,128.67
  4. Step 4: Simplify right side
    1,209,004.55x = 1,109,718,139,306.87
  5. Step 5: Solve for x
    x = 1,109,718,139,306.87/1,209,004.55
  6. Step 6: Final answer
    x = 917,877.55

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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.