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Finding the Fourth Proportional to 507.36, 699.60 and 438.24

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Solution

The fourth proportional to 507.36, 699.60 and 438.24 is: 604.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    507.36 : 699.60 = 438.24 : x
  2. Step 2: Convert to fraction form
    507.36/699.60 = 438.24/x
  3. Step 3: Cross multiply
    507.36x = 699.60 × 438.24
  4. Step 4: Simplify right side
    507.36x = 306,592.70
  5. Step 5: Solve for x
    x = 306,592.70/507.36
  6. Step 6: Final answer
    x = 604.29

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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.