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Finding the Fourth Proportional to 290,034.27, 435,072.36 and 121,384.90

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Solution

The fourth proportional to 290,034.27, 435,072.36 and 121,384.90 is: 182,086.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,034.27 : 435,072.36 = 121,384.90 : x
  2. Step 2: Convert to fraction form
    290,034.27/435,072.36 = 121,384.90/x
  3. Step 3: Cross multiply
    290,034.27x = 435,072.36 × 121,384.90
  4. Step 4: Simplify right side
    290,034.27x = 52,811,217,134.04
  5. Step 5: Solve for x
    x = 52,811,217,134.04/290,034.27
  6. Step 6: Final answer
    x = 182,086.13

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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.