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Finding the Fourth Proportional to 420,247.67, 630,375.81 and 120,727.49

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Solution

The fourth proportional to 420,247.67, 630,375.81 and 120,727.49 is: 181,092.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,247.67 : 630,375.81 = 120,727.49 : x
  2. Step 2: Convert to fraction form
    420,247.67/630,375.81 = 120,727.49/x
  3. Step 3: Cross multiply
    420,247.67x = 630,375.81 × 120,727.49
  4. Step 4: Simplify right side
    420,247.67x = 76,103,686,146.14
  5. Step 5: Solve for x
    x = 76,103,686,146.14/420,247.67
  6. Step 6: Final answer
    x = 181,092.47

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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.