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Finding the Fourth Proportional to 425,288.64, 638,079.84 and 188,796.72

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Solution

The fourth proportional to 425,288.64, 638,079.84 and 188,796.72 is: 283,260.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,288.64 : 638,079.84 = 188,796.72 : x
  2. Step 2: Convert to fraction form
    425,288.64/638,079.84 = 188,796.72/x
  3. Step 3: Cross multiply
    425,288.64x = 638,079.84 × 188,796.72
  4. Step 4: Simplify right side
    425,288.64x = 120,467,380,890.13
  5. Step 5: Solve for x
    x = 120,467,380,890.13/425,288.64
  6. Step 6: Final answer
    x = 283,260.28

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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.