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Finding the Fourth Proportional to 189.92, 284.92 and 53.00

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Solution

The fourth proportional to 189.92, 284.92 and 53.00 is: 79.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    189.92 : 284.92 = 53.00 : x
  2. Step 2: Convert to fraction form
    189.92/284.92 = 53.00/x
  3. Step 3: Cross multiply
    189.92x = 284.92 × 53.00
  4. Step 4: Simplify right side
    189.92x = 15,101.87
  5. Step 5: Solve for x
    x = 15,101.87/189.92
  6. Step 6: Final answer
    x = 79.52

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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.