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Finding the Fourth Proportional to 308,855.26, 426,214.90 and 171,031.45

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Solution

The fourth proportional to 308,855.26, 426,214.90 and 171,031.45 is: 236,020.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,855.26 : 426,214.90 = 171,031.45 : x
  2. Step 2: Convert to fraction form
    308,855.26/426,214.90 = 171,031.45/x
  3. Step 3: Cross multiply
    308,855.26x = 426,214.90 × 171,031.45
  4. Step 4: Simplify right side
    308,855.26x = 72,896,150,227.53
  5. Step 5: Solve for x
    x = 72,896,150,227.53/308,855.26
  6. Step 6: Final answer
    x = 236,020.43

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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.