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Finding the Fourth Proportional to 541.49, 747.28 and 305.54

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Solution

The fourth proportional to 541.49, 747.28 and 305.54 is: 421.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.49 : 747.28 = 305.54 : x
  2. Step 2: Convert to fraction form
    541.49/747.28 = 305.54/x
  3. Step 3: Cross multiply
    541.49x = 747.28 × 305.54
  4. Step 4: Simplify right side
    541.49x = 228,320.58
  5. Step 5: Solve for x
    x = 228,320.58/541.49
  6. Step 6: Final answer
    x = 421.65

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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.