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Finding the Fourth Proportional to 318,618.74, 439,633.14 and 203,809.46

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Solution

The fourth proportional to 318,618.74, 439,633.14 and 203,809.46 is: 281,218.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,618.74 : 439,633.14 = 203,809.46 : x
  2. Step 2: Convert to fraction form
    318,618.74/439,633.14 = 203,809.46/x
  3. Step 3: Cross multiply
    318,618.74x = 439,633.14 × 203,809.46
  4. Step 4: Simplify right side
    318,618.74x = 89,601,392,861.50
  5. Step 5: Solve for x
    x = 89,601,392,861.50/318,618.74
  6. Step 6: Final answer
    x = 281,218.21

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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.