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Finding the Fourth Proportional to 286,034.45, 428,990.92 and 108,479.21

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Solution

The fourth proportional to 286,034.45, 428,990.92 and 108,479.21 is: 162,695.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,034.45 : 428,990.92 = 108,479.21 : x
  2. Step 2: Convert to fraction form
    286,034.45/428,990.92 = 108,479.21/x
  3. Step 3: Cross multiply
    286,034.45x = 428,990.92 × 108,479.21
  4. Step 4: Simplify right side
    286,034.45x = 46,536,593,682.62
  5. Step 5: Solve for x
    x = 46,536,593,682.62/286,034.45
  6. Step 6: Final answer
    x = 162,695.77

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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.