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Finding the Fourth Proportional to 308,904.73, 426,268.45 and 172,937.59

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Solution

The fourth proportional to 308,904.73, 426,268.45 and 172,937.59 is: 238,642.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,904.73 : 426,268.45 = 172,937.59 : x
  2. Step 2: Convert to fraction form
    308,904.73/426,268.45 = 172,937.59/x
  3. Step 3: Cross multiply
    308,904.73x = 426,268.45 × 172,937.59
  4. Step 4: Simplify right side
    308,904.73x = 73,717,838,436.04
  5. Step 5: Solve for x
    x = 73,717,838,436.04/308,904.73
  6. Step 6: Final answer
    x = 238,642.63

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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.