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Finding the Fourth Proportional to 384.79, 577.36 and 189.78

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Solution

The fourth proportional to 384.79, 577.36 and 189.78 is: 284.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    384.79 : 577.36 = 189.78 : x
  2. Step 2: Convert to fraction form
    384.79/577.36 = 189.78/x
  3. Step 3: Cross multiply
    384.79x = 577.36 × 189.78
  4. Step 4: Simplify right side
    384.79x = 109,571.38
  5. Step 5: Solve for x
    x = 109,571.38/384.79
  6. Step 6: Final answer
    x = 284.76

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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.