Home / 387,903,602.95-535,318,310.24-211,702,906.78

Finding the Fourth Proportional to 387,903,602.95, 535,318,310.24 and 211,702,906.78

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Solution

The fourth proportional to 387,903,602.95, 535,318,310.24 and 211,702,906.78 is: 292,156,199.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,903,602.95 : 535,318,310.24 = 211,702,906.78 : x
  2. Step 2: Convert to fraction form
    387,903,602.95/535,318,310.24 = 211,702,906.78/x
  3. Step 3: Cross multiply
    387,903,602.95x = 535,318,310.24 × 211,702,906.78
  4. Step 4: Simplify right side
    387,903,602.95x = 113,328,442,330,365,840
  5. Step 5: Solve for x
    x = 113,328,442,330,365,840/387,903,602.95
  6. Step 6: Final answer
    x = 292,156,199.29

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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.