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Finding the Fourth Proportional to 541.80, 747.63 and 305.71

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Solution

The fourth proportional to 541.80, 747.63 and 305.71 is: 421.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    541.80 : 747.63 = 305.71 : x
  2. Step 2: Convert to fraction form
    541.80/747.63 = 305.71/x
  3. Step 3: Cross multiply
    541.80x = 747.63 × 305.71
  4. Step 4: Simplify right side
    541.80x = 228,557.97
  5. Step 5: Solve for x
    x = 228,557.97/541.80
  6. Step 6: Final answer
    x = 421.85

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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.