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Finding the Fourth Proportional to 308,495.60, 425,745.60 and 172,542.20

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Solution

The fourth proportional to 308,495.60, 425,745.60 and 172,542.20 is: 238,120.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,495.60 : 425,745.60 = 172,542.20 : x
  2. Step 2: Convert to fraction form
    308,495.60/425,745.60 = 172,542.20/x
  3. Step 3: Cross multiply
    308,495.60x = 425,745.60 × 172,542.20
  4. Step 4: Simplify right side
    308,495.60x = 73,459,082,464.32
  5. Step 5: Solve for x
    x = 73,459,082,464.32/308,495.60
  6. Step 6: Final answer
    x = 238,120.36

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.