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Finding the Fourth Proportional to 315,818.28, 435,810.72 and 172,579.44

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Solution

The fourth proportional to 315,818.28, 435,810.72 and 172,579.44 is: 238,149.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,818.28 : 435,810.72 = 172,579.44 : x
  2. Step 2: Convert to fraction form
    315,818.28/435,810.72 = 172,579.44/x
  3. Step 3: Cross multiply
    315,818.28x = 435,810.72 × 172,579.44
  4. Step 4: Simplify right side
    315,818.28x = 75,211,970,003.60
  5. Step 5: Solve for x
    x = 75,211,970,003.60/315,818.28
  6. Step 6: Final answer
    x = 238,149.51

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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.