Home / 385,902,086.85-532,548,243.36-209,690,081.61

Finding the Fourth Proportional to 385,902,086.85, 532,548,243.36 and 209,690,081.61

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Solution

The fourth proportional to 385,902,086.85, 532,548,243.36 and 209,690,081.61 is: 289,374,140.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,902,086.85 : 532,548,243.36 = 209,690,081.61 : x
  2. Step 2: Convert to fraction form
    385,902,086.85/532,548,243.36 = 209,690,081.61/x
  3. Step 3: Cross multiply
    385,902,086.85x = 532,548,243.36 × 209,690,081.61
  4. Step 4: Simplify right side
    385,902,086.85x = 111,670,084,611,420,544
  5. Step 5: Solve for x
    x = 111,670,084,611,420,544/385,902,086.85
  6. Step 6: Final answer
    x = 289,374,140.27

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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.