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Finding the Fourth Proportional to 318,428.97, 439,431.96 and 175,185.95

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Solution

The fourth proportional to 318,428.97, 439,431.96 and 175,185.95 is: 241,756.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,428.97 : 439,431.96 = 175,185.95 : x
  2. Step 2: Convert to fraction form
    318,428.97/439,431.96 = 175,185.95/x
  3. Step 3: Cross multiply
    318,428.97x = 439,431.96 × 175,185.95
  4. Step 4: Simplify right side
    318,428.97x = 76,982,303,175.80
  5. Step 5: Solve for x
    x = 76,982,303,175.80/318,428.97
  6. Step 6: Final answer
    x = 241,756.59

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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.