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Finding the Fourth Proportional to 401,447.25, 553,957.20 and 231,736.05

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Solution

The fourth proportional to 401,447.25, 553,957.20 and 231,736.05 is: 319,772.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,447.25 : 553,957.20 = 231,736.05 : x
  2. Step 2: Convert to fraction form
    401,447.25/553,957.20 = 231,736.05/x
  3. Step 3: Cross multiply
    401,447.25x = 553,957.20 × 231,736.05
  4. Step 4: Simplify right side
    401,447.25x = 128,371,853,397.06
  5. Step 5: Solve for x
    x = 128,371,853,397.06/401,447.25
  6. Step 6: Final answer
    x = 319,772.66

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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.