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Finding the Fourth Proportional to 297,271.20, 445,906.80 and 139,807.20

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Solution

The fourth proportional to 297,271.20, 445,906.80 and 139,807.20 is: 209,710.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,271.20 : 445,906.80 = 139,807.20 : x
  2. Step 2: Convert to fraction form
    297,271.20/445,906.80 = 139,807.20/x
  3. Step 3: Cross multiply
    297,271.20x = 445,906.80 × 139,807.20
  4. Step 4: Simplify right side
    297,271.20x = 62,340,981,168.96
  5. Step 5: Solve for x
    x = 62,340,981,168.96/297,271.20
  6. Step 6: Final answer
    x = 209,710.80

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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.