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Finding the Fourth Proportional to 318,482.40, 477,723.60 and 218,949.60

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Solution

The fourth proportional to 318,482.40, 477,723.60 and 218,949.60 is: 328,424.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,482.40 : 477,723.60 = 218,949.60 : x
  2. Step 2: Convert to fraction form
    318,482.40/477,723.60 = 218,949.60/x
  3. Step 3: Cross multiply
    318,482.40x = 477,723.60 × 218,949.60
  4. Step 4: Simplify right side
    318,482.40x = 104,597,391,130.56
  5. Step 5: Solve for x
    x = 104,597,391,130.56/318,482.40
  6. Step 6: Final answer
    x = 328,424.40

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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.