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Finding the Fourth Proportional to 318,950.17, 478,428.77 and 136,556.44

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Solution

The fourth proportional to 318,950.17, 478,428.77 and 136,556.44 is: 204,836.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    318,950.17 : 478,428.77 = 136,556.44 : x
  2. Step 2: Convert to fraction form
    318,950.17/478,428.77 = 136,556.44/x
  3. Step 3: Cross multiply
    318,950.17x = 478,428.77 × 136,556.44
  4. Step 4: Simplify right side
    318,950.17x = 65,332,528,770.10
  5. Step 5: Solve for x
    x = 65,332,528,770.10/318,950.17
  6. Step 6: Final answer
    x = 204,836.16

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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.