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Finding the Fourth Proportional to 318,072,808.80, 477,109,213.20 and 221,326,927.20

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Solution

The fourth proportional to 318,072,808.80, 477,109,213.20 and 221,326,927.20 is: 331,990,390.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,072,808.80 : 477,109,213.20 = 221,326,927.20 : x
  2. Step 2: Convert to fraction form
    318,072,808.80/477,109,213.20 = 221,326,927.20/x
  3. Step 3: Cross multiply
    318,072,808.80x = 477,109,213.20 × 221,326,927.20
  4. Step 4: Simplify right side
    318,072,808.80x = 105,597,116,096,365,664
  5. Step 5: Solve for x
    x = 105,597,116,096,365,664/318,072,808.80
  6. Step 6: Final answer
    x = 331,990,390.80

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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.