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Finding the Fourth Proportional to 308,893.40, 426,267.45 and 171,069.47

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Solution

The fourth proportional to 308,893.40, 426,267.45 and 171,069.47 is: 236,072.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,893.40 : 426,267.45 = 171,069.47 : x
  2. Step 2: Convert to fraction form
    308,893.40/426,267.45 = 171,069.47/x
  3. Step 3: Cross multiply
    308,893.40x = 426,267.45 × 171,069.47
  4. Step 4: Simplify right side
    308,893.40x = 72,921,344,618.41
  5. Step 5: Solve for x
    x = 72,921,344,618.41/308,893.40
  6. Step 6: Final answer
    x = 236,072.85

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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.