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Finding the Fourth Proportional to 308,605.42, 425,891.53 and 172,641.63

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Solution

The fourth proportional to 308,605.42, 425,891.53 and 172,641.63 is: 238,254.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,605.42 : 425,891.53 = 172,641.63 : x
  2. Step 2: Convert to fraction form
    308,605.42/425,891.53 = 172,641.63/x
  3. Step 3: Cross multiply
    308,605.42x = 425,891.53 × 172,641.63
  4. Step 4: Simplify right side
    308,605.42x = 73,526,607,942.39
  5. Step 5: Solve for x
    x = 73,526,607,942.39/308,605.42
  6. Step 6: Final answer
    x = 238,254.43

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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.