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Finding the Fourth Proportional to 287,704.72, 397,079.28 and 173,099.20

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Solution

The fourth proportional to 287,704.72, 397,079.28 and 173,099.20 is: 238,905.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,704.72 : 397,079.28 = 173,099.20 : x
  2. Step 2: Convert to fraction form
    287,704.72/397,079.28 = 173,099.20/x
  3. Step 3: Cross multiply
    287,704.72x = 397,079.28 × 173,099.20
  4. Step 4: Simplify right side
    287,704.72x = 68,734,105,704.58
  5. Step 5: Solve for x
    x = 68,734,105,704.58/287,704.72
  6. Step 6: Final answer
    x = 238,905.03

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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.