Home / 391,663,876.86-587,371,173.06-129,299,577.28

Finding the Fourth Proportional to 391,663,876.86, 587,371,173.06 and 129,299,577.28

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Solution

The fourth proportional to 391,663,876.86, 587,371,173.06 and 129,299,577.28 is: 193,908,217.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,663,876.86 : 587,371,173.06 = 129,299,577.28 : x
  2. Step 2: Convert to fraction form
    391,663,876.86/587,371,173.06 = 129,299,577.28/x
  3. Step 3: Cross multiply
    391,663,876.86x = 587,371,173.06 × 129,299,577.28
  4. Step 4: Simplify right side
    391,663,876.86x = 75,946,844,381,647,296
  5. Step 5: Solve for x
    x = 75,946,844,381,647,296/391,663,876.86
  6. Step 6: Final answer
    x = 193,908,217.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.