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Finding the Fourth Proportional to 315,889.25, 435,926.36 and 172,650.27

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Solution

The fourth proportional to 315,889.25, 435,926.36 and 172,650.27 is: 238,256.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,889.25 : 435,926.36 = 172,650.27 : x
  2. Step 2: Convert to fraction form
    315,889.25/435,926.36 = 172,650.27/x
  3. Step 3: Cross multiply
    315,889.25x = 435,926.36 × 172,650.27
  4. Step 4: Simplify right side
    315,889.25x = 75,262,802,890.87
  5. Step 5: Solve for x
    x = 75,262,802,890.87/315,889.25
  6. Step 6: Final answer
    x = 238,256.93

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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.