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Finding the Fourth Proportional to 318,666.96, 477,997.20 and 82,008.72

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Solution

The fourth proportional to 318,666.96, 477,997.20 and 82,008.72 is: 123,012.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,666.96 : 477,997.20 = 82,008.72 : x
  2. Step 2: Convert to fraction form
    318,666.96/477,997.20 = 82,008.72/x
  3. Step 3: Cross multiply
    318,666.96x = 477,997.20 × 82,008.72
  4. Step 4: Simplify right side
    318,666.96x = 39,199,938,535.58
  5. Step 5: Solve for x
    x = 39,199,938,535.58/318,666.96
  6. Step 6: Final answer
    x = 123,012.25

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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.