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Finding the Fourth Proportional to 318,651.39, 439,744.55 and 173,461.37

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Solution

The fourth proportional to 318,651.39, 439,744.55 and 173,461.37 is: 239,379.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,651.39 : 439,744.55 = 173,461.37 : x
  2. Step 2: Convert to fraction form
    318,651.39/439,744.55 = 173,461.37/x
  3. Step 3: Cross multiply
    318,651.39x = 439,744.55 × 173,461.37
  4. Step 4: Simplify right side
    318,651.39x = 76,278,689,027.00
  5. Step 5: Solve for x
    x = 76,278,689,027.00/318,651.39
  6. Step 6: Final answer
    x = 239,379.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.