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Finding the Fourth Proportional to 505.12, 695.44 and 349.60

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Solution

The fourth proportional to 505.12, 695.44 and 349.60 is: 481.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.12 : 695.44 = 349.60 : x
  2. Step 2: Convert to fraction form
    505.12/695.44 = 349.60/x
  3. Step 3: Cross multiply
    505.12x = 695.44 × 349.60
  4. Step 4: Simplify right side
    505.12x = 243,125.82
  5. Step 5: Solve for x
    x = 243,125.82/505.12
  6. Step 6: Final answer
    x = 481.32

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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.