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Finding the Fourth Proportional to 318,423.20, 477,634.80 and 225,111.20

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Solution

The fourth proportional to 318,423.20, 477,634.80 and 225,111.20 is: 337,666.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,423.20 : 477,634.80 = 225,111.20 : x
  2. Step 2: Convert to fraction form
    318,423.20/477,634.80 = 225,111.20/x
  3. Step 3: Cross multiply
    318,423.20x = 477,634.80 × 225,111.20
  4. Step 4: Simplify right side
    318,423.20x = 107,520,942,989.76
  5. Step 5: Solve for x
    x = 107,520,942,989.76/318,423.20
  6. Step 6: Final answer
    x = 337,666.80

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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.