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Finding the Fourth Proportional to 357.90, 536.85 and 228.30

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Solution

The fourth proportional to 357.90, 536.85 and 228.30 is: 342.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.90 : 536.85 = 228.30 : x
  2. Step 2: Convert to fraction form
    357.90/536.85 = 228.30/x
  3. Step 3: Cross multiply
    357.90x = 536.85 × 228.30
  4. Step 4: Simplify right side
    357.90x = 122,562.86
  5. Step 5: Solve for x
    x = 122,562.86/357.90
  6. Step 6: Final answer
    x = 342.45

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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.