Home / 1,209,003.96-1,668,425.45-665,128.08

Finding the Fourth Proportional to 1,209,003.96, 1,668,425.45 and 665,128.08

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Solution

The fourth proportional to 1,209,003.96, 1,668,425.45 and 665,128.08 is: 917,876.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,003.96 : 1,668,425.45 = 665,128.08 : x
  2. Step 2: Convert to fraction form
    1,209,003.96/1,668,425.45 = 665,128.08/x
  3. Step 3: Cross multiply
    1,209,003.96x = 1,668,425.45 × 665,128.08
  4. Step 4: Simplify right side
    1,209,003.96x = 1,109,716,604,513.87
  5. Step 5: Solve for x
    x = 1,109,716,604,513.87/1,209,003.96
  6. Step 6: Final answer
    x = 917,876.73

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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.