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Finding the Fourth Proportional to 356.96, 535.20 and 228.64

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Solution

The fourth proportional to 356.96, 535.20 and 228.64 is: 342.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    356.96 : 535.20 = 228.64 : x
  2. Step 2: Convert to fraction form
    356.96/535.20 = 228.64/x
  3. Step 3: Cross multiply
    356.96x = 535.20 × 228.64
  4. Step 4: Simplify right side
    356.96x = 122,368.13
  5. Step 5: Solve for x
    x = 122,368.13/356.96
  6. Step 6: Final answer
    x = 342.81

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.