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Finding the Fourth Proportional to 318,428.91, 439,431.88 and 175,185.88

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Solution

The fourth proportional to 318,428.91, 439,431.88 and 175,185.88 is: 241,756.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,428.91 : 439,431.88 = 175,185.88 : x
  2. Step 2: Convert to fraction form
    318,428.91/439,431.88 = 175,185.88/x
  3. Step 3: Cross multiply
    318,428.91x = 439,431.88 × 175,185.88
  4. Step 4: Simplify right side
    318,428.91x = 76,982,257,524.77
  5. Step 5: Solve for x
    x = 76,982,257,524.77/318,428.91
  6. Step 6: Final answer
    x = 241,756.50

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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.