Home / 385,155,845.88-531,470,226.81-215,619,367.20

Finding the Fourth Proportional to 385,155,845.88, 531,470,226.81 and 215,619,367.20

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Solution

The fourth proportional to 385,155,845.88, 531,470,226.81 and 215,619,367.20 is: 297,529,623.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,155,845.88 : 531,470,226.81 = 215,619,367.20 : x
  2. Step 2: Convert to fraction form
    385,155,845.88/531,470,226.81 = 215,619,367.20/x
  3. Step 3: Cross multiply
    385,155,845.88x = 531,470,226.81 × 215,619,367.20
  4. Step 4: Simplify right side
    385,155,845.88x = 114,595,273,990,412,672
  5. Step 5: Solve for x
    x = 114,595,273,990,412,672/385,155,845.88
  6. Step 6: Final answer
    x = 297,529,623.96

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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.