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Finding the Fourth Proportional to 318,980.57, 478,454.96 and 119,286.28

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Solution

The fourth proportional to 318,980.57, 478,454.96 and 119,286.28 is: 178,923.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,980.57 : 478,454.96 = 119,286.28 : x
  2. Step 2: Convert to fraction form
    318,980.57/478,454.96 = 119,286.28/x
  3. Step 3: Cross multiply
    318,980.57x = 478,454.96 × 119,286.28
  4. Step 4: Simplify right side
    318,980.57x = 57,073,110,533.38
  5. Step 5: Solve for x
    x = 57,073,110,533.38/318,980.57
  6. Step 6: Final answer
    x = 178,923.47

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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.