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Finding the Fourth Proportional to 538,618.59, 743,436.72 and 318,049.17

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Solution

The fourth proportional to 538,618.59, 743,436.72 and 318,049.17 is: 438,992.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,618.59 : 743,436.72 = 318,049.17 : x
  2. Step 2: Convert to fraction form
    538,618.59/743,436.72 = 318,049.17/x
  3. Step 3: Cross multiply
    538,618.59x = 743,436.72 × 318,049.17
  4. Step 4: Simplify right side
    538,618.59x = 236,449,431,743.52
  5. Step 5: Solve for x
    x = 236,449,431,743.52/538,618.59
  6. Step 6: Final answer
    x = 438,992.33

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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.