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Finding the Fourth Proportional to 315,964.69, 436,031.30 and 172,725.77

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Solution

The fourth proportional to 315,964.69, 436,031.30 and 172,725.77 is: 238,361.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,964.69 : 436,031.30 = 172,725.77 : x
  2. Step 2: Convert to fraction form
    315,964.69/436,031.30 = 172,725.77/x
  3. Step 3: Cross multiply
    315,964.69x = 436,031.30 × 172,725.77
  4. Step 4: Simplify right side
    315,964.69x = 75,313,843,558.49
  5. Step 5: Solve for x
    x = 75,313,843,558.49/315,964.69
  6. Step 6: Final answer
    x = 238,361.58

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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.