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Finding the Fourth Proportional to 321,855.90, 482,956.65 and 134,886.30

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Solution

The fourth proportional to 321,855.90, 482,956.65 and 134,886.30 is: 202,401.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,855.90 : 482,956.65 = 134,886.30 : x
  2. Step 2: Convert to fraction form
    321,855.90/482,956.65 = 134,886.30/x
  3. Step 3: Cross multiply
    321,855.90x = 482,956.65 × 134,886.30
  4. Step 4: Simplify right side
    321,855.90x = 65,144,235,578.90
  5. Step 5: Solve for x
    x = 65,144,235,578.90/321,855.90
  6. Step 6: Final answer
    x = 202,401.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.