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Finding the Fourth Proportional to 325,557.36, 488,439.72 and 138,622.32

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Solution

The fourth proportional to 325,557.36, 488,439.72 and 138,622.32 is: 207,977.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,557.36 : 488,439.72 = 138,622.32 : x
  2. Step 2: Convert to fraction form
    325,557.36/488,439.72 = 138,622.32/x
  3. Step 3: Cross multiply
    325,557.36x = 488,439.72 × 138,622.32
  4. Step 4: Simplify right side
    325,557.36x = 67,708,647,166.55
  5. Step 5: Solve for x
    x = 67,708,647,166.55/325,557.36
  6. Step 6: Final answer
    x = 207,977.63

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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.