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Finding the Fourth Proportional to 505.68, 696.24 and 431.88

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Solution

The fourth proportional to 505.68, 696.24 and 431.88 is: 594.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    505.68 : 696.24 = 431.88 : x
  2. Step 2: Convert to fraction form
    505.68/696.24 = 431.88/x
  3. Step 3: Cross multiply
    505.68x = 696.24 × 431.88
  4. Step 4: Simplify right side
    505.68x = 300,692.13
  5. Step 5: Solve for x
    x = 300,692.13/505.68
  6. Step 6: Final answer
    x = 594.63

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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.