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Finding the Fourth Proportional to 497.94, 747.05 and 189.81

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Solution

The fourth proportional to 497.94, 747.05 and 189.81 is: 284.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    497.94 : 747.05 = 189.81 : x
  2. Step 2: Convert to fraction form
    497.94/747.05 = 189.81/x
  3. Step 3: Cross multiply
    497.94x = 747.05 × 189.81
  4. Step 4: Simplify right side
    497.94x = 141,800.72
  5. Step 5: Solve for x
    x = 141,800.72/497.94
  6. Step 6: Final answer
    x = 284.78

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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.