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Finding the Fourth Proportional to 318,980.50, 478,454.86 and 119,286.22

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Solution

The fourth proportional to 318,980.50, 478,454.86 and 119,286.22 is: 178,923.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,980.50 : 478,454.86 = 119,286.22 : x
  2. Step 2: Convert to fraction form
    318,980.50/478,454.86 = 119,286.22/x
  3. Step 3: Cross multiply
    318,980.50x = 478,454.86 × 119,286.22
  4. Step 4: Simplify right side
    318,980.50x = 57,073,071,690.03
  5. Step 5: Solve for x
    x = 57,073,071,690.03/318,980.50
  6. Step 6: Final answer
    x = 178,923.39

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1.5x scale

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.