Home / 1,209,293,689.15-1,668,821,198.61-680,657,368.96

Finding the Fourth Proportional to 1,209,293,689.15, 1,668,821,198.61 and 680,657,368.96

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Solution

The fourth proportional to 1,209,293,689.15, 1,668,821,198.61 and 680,657,368.96 is: 939,304,865.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,209,293,689.15 : 1,668,821,198.61 = 680,657,368.96 : x
  2. Step 2: Convert to fraction form
    1,209,293,689.15/1,668,821,198.61 = 680,657,368.96/x
  3. Step 3: Cross multiply
    1,209,293,689.15x = 1,668,821,198.61 × 680,657,368.96
  4. Step 4: Simplify right side
    1,209,293,689.15x = 1,135,895,446,310,556,160
  5. Step 5: Solve for x
    x = 1,135,895,446,310,556,160/1,209,293,689.15
  6. Step 6: Final answer
    x = 939,304,865.73

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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.