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Finding the Fourth Proportional to 318,392.76, 439,023.26 and 245,630.04

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Solution

The fourth proportional to 318,392.76, 439,023.26 and 245,630.04 is: 338,692.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,392.76 : 439,023.26 = 245,630.04 : x
  2. Step 2: Convert to fraction form
    318,392.76/439,023.26 = 245,630.04/x
  3. Step 3: Cross multiply
    318,392.76x = 439,023.26 × 245,630.04
  4. Step 4: Simplify right side
    318,392.76x = 107,837,300,914.73
  5. Step 5: Solve for x
    x = 107,837,300,914.73/318,392.76
  6. Step 6: Final answer
    x = 338,692.69

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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.