Home / 768,420,476.30-1,062,207,432.87-685,609,371.38

Finding the Fourth Proportional to 768,420,476.30, 1,062,207,432.87 and 685,609,371.38

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Solution

The fourth proportional to 768,420,476.30, 1,062,207,432.87 and 685,609,371.38 is: 947,735,507.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,420,476.30 : 1,062,207,432.87 = 685,609,371.38 : x
  2. Step 2: Convert to fraction form
    768,420,476.30/1,062,207,432.87 = 685,609,371.38/x
  3. Step 3: Cross multiply
    768,420,476.30x = 1,062,207,432.87 × 685,609,371.38
  4. Step 4: Simplify right side
    768,420,476.30x = 728,259,370,325,164,288
  5. Step 5: Solve for x
    x = 728,259,370,325,164,288/768,420,476.30
  6. Step 6: Final answer
    x = 947,735,507.82

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1.5x scale

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.