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Finding the Fourth Proportional to 346,785.20, 520,048.20 and 136,379.60

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Solution

The fourth proportional to 346,785.20, 520,048.20 and 136,379.60 is: 204,518.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,785.20 : 520,048.20 = 136,379.60 : x
  2. Step 2: Convert to fraction form
    346,785.20/520,048.20 = 136,379.60/x
  3. Step 3: Cross multiply
    346,785.20x = 520,048.20 × 136,379.60
  4. Step 4: Simplify right side
    346,785.20x = 70,923,965,496.72
  5. Step 5: Solve for x
    x = 70,923,965,496.72/346,785.20
  6. Step 6: Final answer
    x = 204,518.43

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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.