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Finding the Fourth Proportional to 308,735.52, 426,072.96 and 172,768.28

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Solution

The fourth proportional to 308,735.52, 426,072.96 and 172,768.28 is: 238,430.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,735.52 : 426,072.96 = 172,768.28 : x
  2. Step 2: Convert to fraction form
    308,735.52/426,072.96 = 172,768.28/x
  3. Step 3: Cross multiply
    308,735.52x = 426,072.96 × 172,768.28
  4. Step 4: Simplify right side
    308,735.52x = 73,611,892,453.71
  5. Step 5: Solve for x
    x = 73,611,892,453.71/308,735.52
  6. Step 6: Final answer
    x = 238,430.27

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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.