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Finding the Fourth Proportional to 315,265.65, 435,072.92 and 172,031.73

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Solution

The fourth proportional to 315,265.65, 435,072.92 and 172,031.73 is: 237,407.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,265.65 : 435,072.92 = 172,031.73 : x
  2. Step 2: Convert to fraction form
    315,265.65/435,072.92 = 172,031.73/x
  3. Step 3: Cross multiply
    315,265.65x = 435,072.92 × 172,031.73
  4. Step 4: Simplify right side
    315,265.65x = 74,846,346,243.59
  5. Step 5: Solve for x
    x = 74,846,346,243.59/315,265.65
  6. Step 6: Final answer
    x = 237,407.23

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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.