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Finding the Fourth Proportional to 287,704.47, 397,078.94 and 173,098.95

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Solution

The fourth proportional to 287,704.47, 397,078.94 and 173,098.95 is: 238,904.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,704.47 : 397,078.94 = 173,098.95 : x
  2. Step 2: Convert to fraction form
    287,704.47/397,078.94 = 173,098.95/x
  3. Step 3: Cross multiply
    287,704.47x = 397,078.94 × 173,098.95
  4. Step 4: Simplify right side
    287,704.47x = 68,733,946,715.62
  5. Step 5: Solve for x
    x = 68,733,946,715.62/287,704.47
  6. Step 6: Final answer
    x = 238,904.69

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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.