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Finding the Fourth Proportional to 308,461.25, 425,673.60 and 172,493.63

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Solution

The fourth proportional to 308,461.25, 425,673.60 and 172,493.63 is: 238,039.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,461.25 : 425,673.60 = 172,493.63 : x
  2. Step 2: Convert to fraction form
    308,461.25/425,673.60 = 172,493.63/x
  3. Step 3: Cross multiply
    308,461.25x = 425,673.60 × 172,493.63
  4. Step 4: Simplify right side
    308,461.25x = 73,425,987,130.06
  5. Step 5: Solve for x
    x = 73,425,987,130.06/308,461.25
  6. Step 6: Final answer
    x = 238,039.58

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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.