Home / 1,209,008.07-1,668,431.09-665,132.15

Finding the Fourth Proportional to 1,209,008.07, 1,668,431.09 and 665,132.15

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Solution

The fourth proportional to 1,209,008.07, 1,668,431.09 and 665,132.15 is: 917,882.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,008.07 : 1,668,431.09 = 665,132.15 : x
  2. Step 2: Convert to fraction form
    1,209,008.07/1,668,431.09 = 665,132.15/x
  3. Step 3: Cross multiply
    1,209,008.07x = 1,668,431.09 × 665,132.15
  4. Step 4: Simplify right side
    1,209,008.07x = 1,109,727,149,676.39
  5. Step 5: Solve for x
    x = 1,109,727,149,676.39/1,209,008.07
  6. Step 6: Final answer
    x = 917,882.34

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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.