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Finding the Fourth Proportional to 290,394.09, 400,743.86 and 163,069.70

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Solution

The fourth proportional to 290,394.09, 400,743.86 and 163,069.70 is: 225,036.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,394.09 : 400,743.86 = 163,069.70 : x
  2. Step 2: Convert to fraction form
    290,394.09/400,743.86 = 163,069.70/x
  3. Step 3: Cross multiply
    290,394.09x = 400,743.86 × 163,069.70
  4. Step 4: Simplify right side
    290,394.09x = 65,349,178,207.97
  5. Step 5: Solve for x
    x = 65,349,178,207.97/290,394.09
  6. Step 6: Final answer
    x = 225,036.19

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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.