Home / 387,903,616.96-535,318,329.56-211,702,920.78

Finding the Fourth Proportional to 387,903,616.96, 535,318,329.56 and 211,702,920.78

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Solution

The fourth proportional to 387,903,616.96, 535,318,329.56 and 211,702,920.78 is: 292,156,218.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,903,616.96 : 535,318,329.56 = 211,702,920.78 : x
  2. Step 2: Convert to fraction form
    387,903,616.96/535,318,329.56 = 211,702,920.78/x
  3. Step 3: Cross multiply
    387,903,616.96x = 535,318,329.56 × 211,702,920.78
  4. Step 4: Simplify right side
    387,903,616.96x = 113,328,453,914,922,608
  5. Step 5: Solve for x
    x = 113,328,453,914,922,608/387,903,616.96
  6. Step 6: Final answer
    x = 292,156,218.61

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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.