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Finding the Fourth Proportional to 318,601.78, 477,788.84 and 105,330.33

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Solution

The fourth proportional to 318,601.78, 477,788.84 and 105,330.33 is: 157,957.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,601.78 : 477,788.84 = 105,330.33 : x
  2. Step 2: Convert to fraction form
    318,601.78/477,788.84 = 105,330.33/x
  3. Step 3: Cross multiply
    318,601.78x = 477,788.84 × 105,330.33
  4. Step 4: Simplify right side
    318,601.78x = 50,325,656,187.52
  5. Step 5: Solve for x
    x = 50,325,656,187.52/318,601.78
  6. Step 6: Final answer
    x = 157,957.86

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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.