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Finding the Fourth Proportional to 1,669,891.47, 2,304,454.67 and 905,945.03

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Solution

The fourth proportional to 1,669,891.47, 2,304,454.67 and 905,945.03 is: 1,250,206.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,669,891.47 : 2,304,454.67 = 905,945.03 : x
  2. Step 2: Convert to fraction form
    1,669,891.47/2,304,454.67 = 905,945.03/x
  3. Step 3: Cross multiply
    1,669,891.47x = 2,304,454.67 × 905,945.03
  4. Step 4: Simplify right side
    1,669,891.47x = 2,087,709,255,146.79
  5. Step 5: Solve for x
    x = 2,087,709,255,146.79/1,669,891.47
  6. Step 6: Final answer
    x = 1,250,206.55

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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.