Home / 1,209,001.62-1,668,419.74-665,136.11

Finding the Fourth Proportional to 1,209,001.62, 1,668,419.74 and 665,136.11

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Solution

The fourth proportional to 1,209,001.62, 1,668,419.74 and 665,136.11 is: 917,886.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,001.62 : 1,668,419.74 = 665,136.11 : x
  2. Step 2: Convert to fraction form
    1,209,001.62/1,668,419.74 = 665,136.11/x
  3. Step 3: Cross multiply
    1,209,001.62x = 1,668,419.74 × 665,136.11
  4. Step 4: Simplify right side
    1,209,001.62x = 1,109,726,204,043.03
  5. Step 5: Solve for x
    x = 1,109,726,204,043.03/1,209,001.62
  6. Step 6: Final answer
    x = 917,886.45

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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.