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Finding the Fourth Proportional to 315,148.69, 434,908.34 and 171,911.73

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Solution

The fourth proportional to 315,148.69, 434,908.34 and 171,911.73 is: 237,239.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,148.69 : 434,908.34 = 171,911.73 : x
  2. Step 2: Convert to fraction form
    315,148.69/434,908.34 = 171,911.73/x
  3. Step 3: Cross multiply
    315,148.69x = 434,908.34 × 171,911.73
  4. Step 4: Simplify right side
    315,148.69x = 74,765,846,536.84
  5. Step 5: Solve for x
    x = 74,765,846,536.84/315,148.69
  6. Step 6: Final answer
    x = 237,239.91

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1.5x scale

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.