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Finding the Fourth Proportional to 318,006.96, 477,105.84 and 128,369.76

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Solution

The fourth proportional to 318,006.96, 477,105.84 and 128,369.76 is: 192,593.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,006.96 : 477,105.84 = 128,369.76 : x
  2. Step 2: Convert to fraction form
    318,006.96/477,105.84 = 128,369.76/x
  3. Step 3: Cross multiply
    318,006.96x = 477,105.84 × 128,369.76
  4. Step 4: Simplify right side
    318,006.96x = 61,245,962,175.40
  5. Step 5: Solve for x
    x = 61,245,962,175.40/318,006.96
  6. Step 6: Final answer
    x = 192,593.15

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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.