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Finding the Fourth Proportional to 628.64, 943.12 and 368.86

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Solution

The fourth proportional to 628.64, 943.12 and 368.86 is: 553.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.64 : 943.12 = 368.86 : x
  2. Step 2: Convert to fraction form
    628.64/943.12 = 368.86/x
  3. Step 3: Cross multiply
    628.64x = 943.12 × 368.86
  4. Step 4: Simplify right side
    628.64x = 347,879.11
  5. Step 5: Solve for x
    x = 347,879.11/628.64
  6. Step 6: Final answer
    x = 553.38

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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.