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Finding the Fourth Proportional to 290,007.20, 434,665.20 and 121,527.20

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Solution

The fourth proportional to 290,007.20, 434,665.20 and 121,527.20 is: 182,145.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,007.20 : 434,665.20 = 121,527.20 : x
  2. Step 2: Convert to fraction form
    290,007.20/434,665.20 = 121,527.20/x
  3. Step 3: Cross multiply
    290,007.20x = 434,665.20 × 121,527.20
  4. Step 4: Simplify right side
    290,007.20x = 52,823,644,693.44
  5. Step 5: Solve for x
    x = 52,823,644,693.44/290,007.20
  6. Step 6: Final answer
    x = 182,145.98

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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.