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Finding the Fourth Proportional to 318,428.88, 439,431.83 and 175,185.84

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Solution

The fourth proportional to 318,428.88, 439,431.83 and 175,185.84 is: 241,756.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,428.88 : 439,431.83 = 175,185.84 : x
  2. Step 2: Convert to fraction form
    318,428.88/439,431.83 = 175,185.84/x
  3. Step 3: Cross multiply
    318,428.88x = 439,431.83 × 175,185.84
  4. Step 4: Simplify right side
    318,428.88x = 76,982,236,347.12
  5. Step 5: Solve for x
    x = 76,982,236,347.12/318,428.88
  6. Step 6: Final answer
    x = 241,756.46

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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.