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Finding the Fourth Proportional to 425,898, 638,955 and 159,659.28

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Solution

The fourth proportional to 425,898, 638,955 and 159,659.28 is: 239,529.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,898 : 638,955 = 159,659.28 : x
  2. Step 2: Convert to fraction form
    425,898/638,955 = 159,659.28/x
  3. Step 3: Cross multiply
    425,898x = 638,955 × 159,659.28
  4. Step 4: Simplify right side
    425,898x = 102,015,095,252.40
  5. Step 5: Solve for x
    x = 102,015,095,252.40/425,898
  6. Step 6: Final answer
    x = 239,529.41

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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.