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Finding the Fourth Proportional to 505.48, 696.30 and 422.56

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Solution

The fourth proportional to 505.48, 696.30 and 422.56 is: 582.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.48 : 696.30 = 422.56 : x
  2. Step 2: Convert to fraction form
    505.48/696.30 = 422.56/x
  3. Step 3: Cross multiply
    505.48x = 696.30 × 422.56
  4. Step 4: Simplify right side
    505.48x = 294,228.53
  5. Step 5: Solve for x
    x = 294,228.53/505.48
  6. Step 6: Final answer
    x = 582.08

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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.