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Finding the Fourth Proportional to 305,036.72, 420,975.88 and 169,113.30

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Solution

The fourth proportional to 305,036.72, 420,975.88 and 169,113.30 is: 233,390.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,036.72 : 420,975.88 = 169,113.30 : x
  2. Step 2: Convert to fraction form
    305,036.72/420,975.88 = 169,113.30/x
  3. Step 3: Cross multiply
    305,036.72x = 420,975.88 × 169,113.30
  4. Step 4: Simplify right side
    305,036.72x = 71,192,620,287.20
  5. Step 5: Solve for x
    x = 71,192,620,287.20/305,036.72
  6. Step 6: Final answer
    x = 233,390.33

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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.