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Finding the Fourth Proportional to 290,235.20, 435,007.20 and 121,755.20

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Solution

The fourth proportional to 290,235.20, 435,007.20 and 121,755.20 is: 182,487.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,235.20 : 435,007.20 = 121,755.20 : x
  2. Step 2: Convert to fraction form
    290,235.20/435,007.20 = 121,755.20/x
  3. Step 3: Cross multiply
    290,235.20x = 435,007.20 × 121,755.20
  4. Step 4: Simplify right side
    290,235.20x = 52,964,388,637.44
  5. Step 5: Solve for x
    x = 52,964,388,637.44/290,235.20
  6. Step 6: Final answer
    x = 182,487.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.