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Finding the Fourth Proportional to 318,638.80, 477,958.20 and 223,253.20

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Solution

The fourth proportional to 318,638.80, 477,958.20 and 223,253.20 is: 334,879.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,638.80 : 477,958.20 = 223,253.20 : x
  2. Step 2: Convert to fraction form
    318,638.80/477,958.20 = 223,253.20/x
  3. Step 3: Cross multiply
    318,638.80x = 477,958.20 × 223,253.20
  4. Step 4: Simplify right side
    318,638.80x = 106,705,697,616.24
  5. Step 5: Solve for x
    x = 106,705,697,616.24/318,638.80
  6. Step 6: Final answer
    x = 334,879.80

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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.